**Error Detection in English Sentences** (เด‡เด‚เด—เตเดฒเต€เดทเต เดตเดพเด•เตเดฏเด™เตเด™เดณเดฟเดฒเต† เดชเดฟเดถเด•เตเด•เตพ เด•เดฃเตเดŸเตเดชเดฟเดŸเดฟเด•เตเด•เตฝ)

Error detection เดŽเดจเตเดจเดคเต เด‡เด‚เด—เตเดฒเต€เดทเต เดตเดพเด•เตเดฏเด™เตเด™เดณเดฟเตฝ เด‰เดณเตเดณ เด—เตเดฐเดพเดฎเดฑเตเดฑเดฟเด•เตเด•เตฝ, เดธเตเดชเต†เดฒเตเดฒเดฟเด™เต, เดŸเต†เตปเดธเต, เดฒเต‹เดœเดฟเด•เตเด•เตฝ เดคเตเดŸเด™เตเด™เดฟเดฏ เดชเดฟเดถเด•เตเด•เตพ เด•เดฃเตเดŸเตเดชเดฟเดŸเดฟเด•เตเด•เตเดจเตเดจ เดชเตเดฐเด•เตเดฐเดฟเดฏเดฏเดพเดฃเต. เด‡เดคเต เดชเตเดฐเดคเตเดฏเต‡เด•เดฟเดšเตเดšเต competitive exams (SSC, Bank, UPSC, Kerala PSC เดคเตเดŸเด™เตเด™เดฟเดฏเดต), writing improvement, proofreading เดŽเดจเตเดจเดฟเดตเดฏเดฟเตฝ เดตเดณเดฐเต† เดชเตเดฐเดงเดพเดจเดฎเดพเดฃเต.

### เดชเตเดฐเดงเดพเดจ เดคเดฐเด‚เด—เดคเดฟเด•เตพ (Types of Errors)

1. **Subject-Verb Agreement Error** (เดตเดฟเดทเดฏ-เด•เตเดฐเดฟเดฏ เดฏเต‹เดœเดฟเดชเตเดชเดฟเดฒเตเดฒเดพเดฏเตเดฎ)
2. **Tense Error** (เด•เดพเดฒเด˜เดŸเตเดŸ เดชเดฟเดถเด•เต)
3. **Article Error** (a, an, the เด‰เดชเดฏเต‹เด—เด‚)
4. **Preposition Error** (เด…เดตเดธเดพเดจเดตเดพเด•เตเด•เตเด•เตพ)
5. **Pronoun Error** (เดธเตผเดตเดจเดพเดฎเด™เตเด™เตพ)
6. **Adjective/Adverb Error**
7. **Spelling & Punctuation Error**
8. **Redundancy & Word Choice Error**

เดจเดฎเตเด•เตเด•เต เด“เดฐเต‹เดจเตเดจเดฟเดจเตเด‚ เด‰เดฆเดพเดนเดฐเดฃเด™เตเด™เตพ เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเดคเตเดคเต‹เดŸเตŠเดชเตเดชเด‚ เดจเต‹เด•เตเด•เดพเด‚.

### 1. Subject-Verb Agreement
**Rule**: Singular subject โ†’ singular verb, Plural subject โ†’ plural verb.

**Example 1:**
– Wrong: The team of players **are** winning the match.
– Correct: The team of players **is** winning the match.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “team” เดŽเดจเตเดจเดคเต collective noun เด†เดฏเดคเดฟเดจเดพเตฝ singular เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ verb เด‰เด‚ singular เด†เดฏเดฟเดฐเดฟเด•เตเด•เดฃเด‚. “of players” เดŽเดจเตเดจ phrase subject-เดจเต† เดฎเดพเดฑเตเดฑเตเดจเตเดจเดฟเดฒเตเดฒ.

**Example 2:**
– Wrong: Neither the teacher nor the students **is** coming.
– Correct: Neither the teacher nor the students **are** coming.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “nor” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดฎเตเดชเต‹เตพ เด…เดŸเตเดคเตเดคเตเดณเตเดณ subject-เดจเตเดฑเต† number เดชเตเดฐเด•เดพเดฐเด‚ verb เดตเดฐเดฃเด‚. เด‡เดตเดฟเดŸเต† “students” plural เด†เดฏเดคเดฟเดจเดพเตฝ “are”.

### 2. Tense Error
**Rule**: เดตเดพเด•เตเดฏเดคเตเดคเดฟเดจเตเดฑเต† เดธเดฎเดฏเด‚ เด…เดจเตเดธเดฐเดฟเดšเตเดšเต tense เดฎเดพเดฑเตเดฑเดฐเตเดคเต.

**Example:**
– Wrong: Yesterday I **go** to the market and buy vegetables.
– Correct: Yesterday I **went** to the market and **bought** vegetables.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “Yesterday” เดŽเดจเตเดจเดคเต past time เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ verb-เดจเตเดฑเต† past form (went, bought) เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚. Present tense เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเดคเต เดคเต†เดฑเตเดฑเดพเดฃเต.

### 3. Article Error
**Rule**:
– a โ†’ consonant sound
– an โ†’ vowel sound
– the โ†’ เดชเตเดฐเดคเตเดฏเต‡เด• เดจเดพเดฎเด™เตเด™เตพเด•เตเด•เต

**Example 1:**
– Wrong: She is **a** honest girl.
– Correct: She is **an** honest girl.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “honest” เดŽเดจเตเดจ เดตเดพเด•เตเด•เดฟเดจเตเดฑเต† เด†เดฆเตเดฏ เดถเดฌเตเดฆเด‚ vowel sound (/ษ’/) เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ “an” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚.

**Example 2:**
– Wrong: Sun rises in **east**.
– Correct: The sun rises in **the** east.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดธเต‚เดฐเตเดฏเตป, เดญเต‚เดฎเดฟ, เด†เด•เดพเดถเด‚ เดคเตเดŸเด™เตเด™เดฟเดฏ unique things-เดจเต “the” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚.

### 4. Preposition Error
**Example:**
– Wrong: He is suffering **with** fever.
– Correct: He is suffering **from** fever.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “suffer” เดŽเดจเตเดจ verb-เดจเต‹เดŸเต “from” preposition เด†เดฃเต เดถเดฐเดฟ. “with” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเดคเต เดคเต†เดฑเตเดฑเดพเดฃเต.

เดฎเดฑเตเดฑเตŠเดฐเต เด‰เดฆเดพเดนเดฐเดฃเด‚:
– Wrong: She is good **in** English.
– Correct: She is good **at** English.

### 5. Pronoun Error
**Example:**
– Wrong: Each of the boys **have** submitted **their** project.
– Correct: Each of the boys **has** submitted **his** project.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “Each of” singular เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ verb singular (“has”) เด†เดฏเดฟเดฐเดฟเด•เตเด•เดฃเด‚. Pronoun เด†เดฃเต†เด™เตเด•เดฟเดฒเตเด‚ “his” (singular) เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเด•.

### 6. Common Spotting Error เดตเดพเด•เตเดฏเด™เตเด™เตพ (Practice)

**เดตเดพเด•เตเดฏเด‚ 1:**
– Wrong: One of my friend **are** coming to my house.
– Correct: One of my **friends** **is** coming to my house.

**เดตเดพเด•เตเดฏเด‚ 2:**
– Wrong: The police **has** arrested the thief yesterday.
– Correct: The police **have** arrested the thief yesterday. (Police collective เด†เดฃเต†เด™เตเด•เดฟเดฒเตเด‚ เด‡เดจเตเดคเตเดฏเตป usage-เตฝ plural verb เดธเดพเดงเดพเดฐเดฃเด‚)

**เดตเดพเด•เตเดฏเด‚ 3:**
– Wrong: She **donโ€™t** know how to swim.
– Correct: She **doesnโ€™t** know how to swim.

**เดตเดพเด•เตเดฏเด‚ 4:**
– Wrong: He is **more taller** than his brother.
– Correct: He is **taller** than his brother. (Double comparative เดคเต†เดฑเตเดฑเต)

**เดตเดพเด•เตเดฏเด‚ 5:**
– Wrong: I have been living here **since** three years.
– Correct: I have been living here **for** three years.

### เดŸเดฟเดชเตเดชเตเด•เตพ Error Detection-เดจเต
– เดตเดพเด•เตเดฏเด‚ เด’เดฐเต เดคเดตเดฃ เดฎเตเดดเตเดตเตป เดตเดพเดฏเดฟเด•เตเด•เตเด•.
– Subject เดเดคเต, เด…เดคเดฟเดจเตเดฑเต† number เดŽเดจเตเดคเต เดŽเดจเตเดจเต เด†เดฆเตเดฏเด‚ เดจเต‹เด•เตเด•เตเด•.
– Time expressions (yesterday, since, for, already) เดถเตเดฐเดฆเตเดงเดฟเด•เตเด•เตเด•.
– “One of”, “Each of”, “Neither…nor” เดคเตเดŸเด™เตเด™เดฟเดฏ phrases เดถเตเดฐเดฆเตเดงเดฟเด•เตเด•เตเด•.
– Parallel structure เด‰เดฃเตเดŸเต‹ เดŽเดจเตเดจเต เดจเต‹เด•เตเด•เตเด•.

**Tense Errors in English Sentences**
(เด‡เด‚เด—เตเดฒเต€เดทเต เดตเดพเด•เตเดฏเด™เตเด™เดณเดฟเดฒเต† **เด•เดพเดฒเด˜เดŸเตเดŸ (Tense) เดชเดฟเดถเด•เตเด•เตพ** โ€“ เดตเดฟเดถเดฆเดฎเดพเดฏ เด‰เดฆเดพเดนเดฐเดฃเด™เตเด™เตพ)

Tense error เดŽเดจเตเดจเดคเต เดตเดพเด•เตเดฏเดคเตเดคเดฟเตฝ เด‰เดชเดฏเต‹เด—เดฟเดšเตเดšเดฟเดฐเดฟเด•เตเด•เตเดจเตเดจ verb-เดจเตเดฑเต† เดฐเต‚เดชเด‚ เด…เดคเดฟเดจเตเดฑเต† เดธเดฎเดฏเดตเตเดฎเดพเดฏเดฟ (time) เดชเตŠเดฐเตเดคเตเดคเดชเตเดชเต†เดŸเดพเดคเตเดค เดธเดพเดนเดšเดฐเตเดฏเดฎเดพเดฃเต. เด‡เดคเต competitive exams-เตฝ เดเดฑเตเดฑเดตเตเด‚ เด•เต‚เดŸเตเดคเตฝ เดšเต‹เดฆเดฟเด•เตเด•เตเดจเตเดจ error type-เด•เดณเดฟเดฒเตŠเดจเตเดจเดพเดฃเต.

### เดชเตเดฐเดงเดพเดจ Tense Rules (เด“เตผเด•เตเด•เต‡เดฃเตเดŸ เด…เดŸเดฟเดธเตเดฅเดพเดจ เดจเดฟเดฏเดฎเด™เตเด™เตพ)
– **Time expression** (yesterday, tomorrow, since, for, already, now, etc.) เดจเต‹เด•เตเด•เดฟ tense เดคเต€เดฐเตเดฎเดพเดจเดฟเด•เตเด•เตเด•.
– เด’เดฐเต เดตเดพเด•เตเดฏเดคเตเดคเดฟเตฝ เดฐเดฃเตเดŸเต เด•เตเดฒเต‹เดธเตเด•เดณเตเดฃเตเดŸเต†เด™เตเด•เดฟเตฝ tense consistency (parallelism) เด‰เดฃเตเดŸเดพเดฏเดฟเดฐเดฟเด•เตเด•เดฃเด‚.
– Perfect tenses, continuous forms เดŽเดจเตเดจเดฟเดตเดฏเตเดŸเต† เดชเตเดฐเดคเตเดฏเต‡เด• เด‰เดชเดฏเต‹เด—เด‚ เดถเตเดฐเดฆเตเดงเดฟเด•เตเด•เตเด•.

—

### 1. Simple Present vs Past Error

**Example 1:**
– **Wrong**: Yesterday I **go** to the market and **buy** some fruits.
– **Correct**: Yesterday I **went** to the market and **bought** some fruits.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “Yesterday” เดŽเดจเตเดจเดคเต past time เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ verb-เดจเตเดฑเต† past form (went, bought) เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚. Present tense เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเดคเต เดตเดณเดฐเต† เดธเดพเดงเดพเดฐเดฃเดฎเดพเดฏ เดคเต†เดฑเตเดฑเดพเดฃเต.

**Example 2:**
– **Wrong**: Last week she **visit** her grandparents and **spend** the whole day there.
– **Correct**: Last week she **visited** her grandparents and **spent** the whole day there.

—

### 2. Present Perfect vs Simple Past Error

**Example 1:**
– **Wrong**: I **have seen** him yesterday at the station.
– **Correct**: I **saw** him yesterday at the station.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: Present Perfect (“have seen”) เดจเดฟเดฒเดตเดฟเดฒเต† เดซเดฒเดคเตเดคเต‹เดŸเต เดฌเดจเตเดงเดชเตเดชเต†เดŸเตเดŸเดฟเดฐเดฟเด•เตเด•เตเดฎเตเดชเต‹เตพ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเต. “Yesterday” เดชเต‹เดฒเตเดณเตเดณ specific past time expression-เดจเต‹เดŸเตŠเดชเตเดชเด‚ Present Perfect เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฐเตเดคเต.

**Example 2:**
– **Wrong**: She **has completed** her degree in 2020.
– **Correct**: She **completed** her degree in 2020.

**Nuance**: เดจเดฟเดฒเดตเดฟเตฝ เดซเดฒเดฎเตเดฃเตเดŸเต†เด™เตเด•เดฟเตฝ (experience, unfinished time) Present Perfect เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดพเด‚.
เด‰เดฆเดพ: She **has completed** many projects this year. (this year เด‡เดชเตเดชเต‹เดดเตเด‚ เดคเตเดŸเดฐเตเดจเตเดจเต)

—

### 3. Past Perfect (had + V3) Error

**Rule**: เดฐเดฃเตเดŸเต past actions-เตฝ เด†เดฆเตเดฏเด‚ เดจเดŸเดจเตเดจเดคเต Past Perfect-เตฝ เดชเดฑเดฏเดฃเด‚.

**Example 1:**
– **Wrong**: When I reached the station, the train **left** already.
– **Correct**: When I reached the station, the train **had left** already.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: Train เดชเต‹เดฏเดคเต เดžเดพเตป เดธเตเดฑเตเดฑเต‡เดทเดจเดฟเตฝ เดŽเดคเตเดคเตเดจเตเดจเดคเดฟเดจเต เดฎเตเดฎเตเดชเต เด†เดฏเดคเดฟเดจเดพเตฝ “had left” (Past Perfect) เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚.

**Example 2:**
– **Wrong**: She told me that she **went** to Delhi the previous week.
– **Correct**: She told me that she **had gone** to Delhi the previous week.

—

### 4. Present Continuous vs Simple Present Error

**Example:**
– **Wrong**: Look! The sun **rises** in the east. (เดคเต†เดฑเตเดฑเดฒเตเดฒเต†เด™เตเด•เดฟเดฒเตเด‚ context เดคเต†เดฑเตเดฑเต)
– **Better (for current action)**: Look! The children **are playing** in the garden.

**Common Mistake**:
– **Wrong**: I **am believing** you.
– **Correct**: I **believe** you.
(Verbs like believe, know, like, hate, want เดคเตเดŸเด™เตเด™เดฟเดฏ stative verbs-เดจเต continuous tense เดธเดพเดงเดพเดฐเดฃเดฎเดพเดฏเดฟ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฐเตเดคเต)

—

### 5. Future Tense Errors

**Example 1:**
– **Wrong**: I **will be going** to the party tomorrow if I **will get** time.
– **Correct**: I **will go** to the party tomorrow if I **get** time.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: Conditional clause (if clause) เดฒเตเด‚ time clause (when, before, after) เดฒเตเด‚ future tense เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฐเตเดคเต. Present tense เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเด•.

**Example 2:**
– **Wrong**: By this time next year, I **will complete** my graduation.
– **Correct**: By this time next year, I **will have completed** my graduation. (Future Perfect)

—

### 6. Mixed Tense Errors (เดฐเดฃเตเดŸเต เด•เตเดฒเต‹เดธเตเด•เดณเดฟเตฝ tense mismatch)

**Example 1:**
– **Wrong**: He said that he **is** going to the market. (Reporting verb past เด†เดฃเต†เด™เตเด•เดฟเตฝ)
– **Correct**: He said that he **was** going to the market.

**Backshift Rule** (Indirect Speech):
Direct: He said, โ€œI am going.โ€
Indirect: He said that he **was** going.

**Exception**: Universal truth เด†เดฃเต†เด™เตเด•เดฟเตฝ tense เดฎเดพเดฑเตเดฑเต‡เดฃเตเดŸเดคเดฟเดฒเตเดฒ.
เด‰เดฆเดพ: The teacher said that the earth **is** round.

—

### 7. Present Perfect Continuous Error

**Example:**
– **Wrong**: I **am living** in this house since 2015.
– **Correct**: I **have been living** in this house since 2015.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: “Since 2015” เดŽเดจเตเดจเดคเต past-เตฝ เดคเตเดŸเด™เตเด™เดฟ เด‡เดชเตเดชเต‹เดดเตเด‚ เดคเตเดŸเดฐเตเดจเตเดจ action เด†เดฃเต. เด…เดคเดฟเดจเดพเตฝ Present Perfect Continuous เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚.

—

### 8. High-Level / Tricky Examples (Exams-เตฝ เดตเดฐเตเดจเตเดจ เดคเดฐเด‚)

1. **Wrong**: By the time we reached there, the meeting **was ended**.
**Correct**: By the time we reached there, the meeting **had ended**.

2. **Wrong**: If I **would have** money, I would buy a car.
**Correct**: If I **had** money, I would buy a car. (Second Conditional)

3. **Wrong**: She **has went** to school.
**Correct**: She **has gone** to school.

4. **Wrong**: I wish I **can** fly.
**Correct**: I wish I **could** fly. (Subjunctive mood)

5. **Wrong**: This is the first time I **eat** sushi.
**Correct**: This is the first time I **have eaten** sushi.

—

### Error Detection Practice Set (10 เดตเดพเด•เตเดฏเด™เตเด™เตพ)

1. She **has went** to the doctor last Monday.
2. When I **will reach** home, I will call you.
3. They **are knowing** the answer since yesterday.
4. By 2025, I **will finish** my studies.
5. He told me that he **will come** yesterday.
6. I **live** in Kochi for ten years.
7. The train **left** before we reached the station.
8. She **is working** here since 2018.
9. If you **will study** hard, you will pass.
10. Yesterday night I **have completed** my assignment.

(เดถเดฐเดฟเดฏเดพเดฏ เดฐเต‚เดชเด™เตเด™เตพ เดตเต‡เดฃเดฎเต†เด™เตเด•เดฟเตฝ เดชเดฑเดฏเต‚ โ€“ เดžเดพเตป เดคเดฐเดพเด‚)

—

**Pro Tips for Tense Error Detection**:
– “Yesterday, last week, ago, in 2020” โ†’ Past tense
– “Since, for, already, yet, just” โ†’ Perfect tense
– “By the time, before, after” (past context) โ†’ Past Perfect
– Reporting verb past เด†เดฃเต†เด™เตเด•เดฟเตฝ tense backshift เดšเต†เดฏเตเดฏเตเด•
– เด’เดฐเต paragraph-เตฝ tense consistency เดจเต‹เด•เตเด•เตเด•

**Past Perfect Tense โ€“ เดตเดฟเดถเดฆเดฎเดพเดฏ เด—เตˆเดกเต & เด‰เดฆเดพเดนเดฐเดฃเด™เตเด™เตพ**
(เด‡เด‚เด—เตเดฒเต€เดทเต Tense Errors-เตฝ Past Perfect)

**Past Perfect Tense** = **had + V3** (had gone, had eaten, had completed, had seen เดคเตเดŸเด™เตเด™เดฟเดฏเดต)

### เดŽเดชเตเดชเต‹เตพ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚? (Main Uses)

1. **เดฐเดฃเตเดŸเต Past Actions** โ€“ เด†เดฆเตเดฏเด‚ เดจเดŸเดจเตเดจ action Past Perfect-เตฝ, เดชเดฟเดจเตเดจเต€เดŸเต เดจเดŸเดจเตเดจเดคเต Simple Past-เตฝ.
2. **By the time / Before / After / When / Already / Just** เดชเต‹เดฒเตเดณเตเดณ expressions-เดจเต‹เดŸเตŠเดชเตเดชเด‚.
3. **Indirect Speech**-เตฝ (Reporting verb Past tense เด†เดฃเต†เด™เตเด•เดฟเตฝ).
4. **Unreal / Regret / Wish** situations-เตฝ (Third Conditional, I wish, If only).
5. **Reported thoughts / Feelings** in the past.

—

### 1. Basic Examples (เดฐเดฃเตเดŸเต Past Actions)

**Example 1:**
– **Wrong**: When I reached the station, the train **left**.
– **Correct**: When I reached the station, the train **had left**.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดŸเตเดฐเต†เดฏเดฟเตป เดชเต‹เดฏเดคเต เดžเดพเตป เดธเตเดฑเตเดฑเต‡เดทเดจเดฟเตฝ เดŽเดคเตเดคเตเดจเตเดจเดคเดฟเดจเต **เดฎเตเดฎเตเดชเต** เด†เดฏเดฟเดฐเตเดจเตเดจเต. เด…เดคเดฟเดจเดพเตฝ เด†เดฆเตเดฏ action-เดจเต Past Perfect (“had left”) เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเด‚.

**Example 2:**
– **Wrong**: She told me that she **finished** her homework.
– **Correct**: She told me that she **had finished** her homework.

**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: Homework เดคเต€เตผเดคเตเดคเดคเต เด…เดตเตพ เดŽเดจเตเดจเต‹เดŸเต เดชเดฑเดžเตเดžเดคเดฟเดจเต เดฎเตเดฎเตเดชเดพเดฃเต.

**Example 3:**
– **Wrong**: By the time we arrived, the movie **started**.
– **Correct**: By the time we arrived, the movie **had started**.

—

### 2. With Time Expressions

**Example 1:**
– **Wrong**: I **reached** the office before the meeting **began**. (เดคเต†เดฑเตเดฑเดฒเตเดฒเต†เด™เตเด•เดฟเดฒเตเด‚ Past Perfect เดฎเดฟเด•เดšเตเดšเดคเต)
– **Better**: I **had reached** the office before the meeting began.

**Example 2:**
– **Wrong**: She **already left** when I called her.
– **Correct**: She **had already left** when I called her.

**Example 3:**
– **Wrong**: After he **had eaten** dinner, he went to bed. (เดถเดฐเดฟ)
– **Also Correct**: After he ate dinner, he went to bed. (เดฐเดฃเตเดŸเตเด‚ เดถเดฐเดฟ, เดชเด•เตเดทเต‡ Past Perfect เด•เต‚เดŸเตเดคเตฝ clarity เดคเดฐเตเด‚)

**Nuance**: “After” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดฎเตเดชเต‹เตพ Simple Past เดฎเดคเดฟเดฏเดพเด•เดพเด‚, เดชเด•เตเดทเต‡ “Before / By the time” เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดฎเตเดชเต‹เตพ Past Perfect เดจเดฟเตผเดฌเดจเตเดงเดฎเดพเดฏเตเด‚ เดตเต‡เดฃเด‚.

—

### 3. Past Perfect in Indirect Speech (Backshift)

**Direct Speech โ†’ Indirect Speech**

– Direct: โ€œI have finished my work,โ€ she said.
– Indirect: She said that she **had finished** her work.

– Direct: โ€œI went to Chennai yesterday,โ€ he told me.
– Indirect: He told me that he **had gone** to Chennai the previous day.

**Example (Error):**
– **Wrong**: He said that he **saw** the movie last night.
– **Correct**: He said that he **had seen** the movie the previous night.

—

### 4. Third Conditional & Regret

**Example 1:**
– **Wrong**: If I **studied** hard, I would have passed.
– **Correct**: If I **had studied** hard, I would have passed.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดฏเดฅเดพเตผเดคเตเดฅเดคเตเดคเดฟเตฝ เดชเด เดฟเดšเตเดšเดฟเดฒเตเดฒ, เด…เดคเดฟเดจเดพเตฝ เดคเต‹เดฑเตเดฑเต. Past Perfect เด‰เดชเดฏเต‹เด—เดฟเดšเตเดšเต regret เด•เดพเดฃเดฟเด•เตเด•เตเดจเตเดจเต.

**Example 2:**
– **Wrong**: I wish I **didnโ€™t miss** the chance.
– **Correct**: I wish I **hadnโ€™t missed** the chance.

**Example 3:**
– **Wrong**: If only she **came** earlier!
– **Correct**: If only she **had come** earlier!

—

### 5. Tricky & High-Level Examples (Exams-เตฝ เดตเดฐเตเดจเตเดจ เดคเดฐเด‚)

1. **Wrong**: The patient **died** before the doctor arrived.
**Correct**: The patient **had died** before the doctor arrived.

2. **Wrong**: Scarcely I **had reached** the station when the train left.
**Correct**: Scarcely **had I reached** the station when the train left. (Inversion)

3. **Wrong**: No sooner he **finished** the work than he left.
**Correct**: No sooner **had he finished** the work than he left.

4. **Wrong**: She **has completed** the project before I started mine.
**Correct**: She **had completed** the project before I started mine.

5. **Wrong**: By 10 pm yesterday, I **wrote** three letters.
**Correct**: By 10 pm yesterday, I **had written** three letters.

6. **Wrong**: He told me that he **was** to Mumbai last week.
**Correct**: He told me that he **had been** to Mumbai the previous week.

—

### 6. Common Student Mistakes (Avoid these)

| Wrong Sentence | Correct Sentence | Reason |
|—————————————–|———————————————–|——–|
| I had went to school | I had gone to school | V3 is “gone” |
| When I had reached home, it rained | When I reached home, it had rained | Order เดคเต†เดฑเตเดฑเดฟ |
| She said she has seen the movie | She said she had seen the movie | Backshift |
| If he would have worked hard | If he had worked hard | Third Conditional |
| They had already left before I reach | They had already left before I reached | Both past, but consistency |

—

### 7. Practice Set โ€“ Spot the Error (Past Perfect)

1. By the time the police arrived, the thief escaped.
2. She told me that she saw the Taj Mahal when she was in Agra.
3. If you had called me earlier, I will help you.
4. Hardly I had entered the class when the teacher started teaching.
5. I finished my homework before my mother came.
6. He said he already completed the assignment.
7. No sooner the bell rang than the students left.
8. She wished she didnโ€™t waste her time.
9. The movie had already started before we reached the theatre.
10. When I woke up, the sun rose.

(เดถเดฐเดฟเดฏเดพเดฏ เด‰เดคเตเดคเดฐเด™เตเด™เตพ เดตเต‡เดฃเดฎเต†เด™เตเด•เดฟเตฝ เดชเดฑเดฏเต‚ โ€“ เดžเดพเตป เดตเดฟเดถเดฆเดฎเดพเดฏเดฟ เดคเดฐเดพเด‚)

—

### Pro Tips for Error Detection

– “Before”, “By the time”, “When” (past context) โ†’ เด†เดฆเตเดฏ action-เดจเต Past Perfect.
– “After” โ†’ เดฐเดฃเตเดŸเตเด‚ เดถเดฐเดฟ, เดชเด•เตเดทเต‡ Past Perfect เด•เต‚เดŸเตเดคเตฝ precise.
– “Already, Just, Yet” + Past โ†’ Past Perfect.
– Scarcely/Hardly/No sooner โ†’ Inversion + Past Perfect.
– เด’เดฐเต paragraph-เตฝ เดฐเดฃเตเดŸเต past actions เด‰เดฃเตเดŸเต†เด™เตเด•เดฟเตฝ tense sequence เดถเตเดฐเดฆเตเดงเดฟเด•เตเด•เตเด•.

**Third Conditional โ€“ เดตเดฟเดถเดฆเดฎเดพเดฏ เด—เตˆเดกเต & Scenarios**
(เด‡เด‚เด—เตเดฒเต€เดทเต Grammar-เตฝ Third Conditional เด‰เดชเดฏเต‹เด—เด‚)

Third Conditional เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเดคเต **เดญเต‚เดคเด•เดพเดฒเดคเตเดคเดฟเตฝ (Past) เดธเด‚เดญเดตเดฟเดšเตเดšเดฟเดŸเตเดŸเดฟเดฒเตเดฒเดพเดคเตเดค** เด…เดฒเตเดฒเต†เด™เตเด•เดฟเตฝ **เดธเด‚เดญเดตเดฟเด•เตเด•เดพเตป เดธเดพเดงเตเดฏเดคเดฏเดฟเดฒเตเดฒเดพเดคเตเดค** เดธเดพเดนเดšเดฐเตเดฏเด™เตเด™เตพ เดธเด‚เดญเดพเดตเดจ เดšเต†เดฏเตเดฏเดพเดจเดพเดฃเต. เด‡เดคเต regret (เดชเดถเตเดšเดพเดคเตเดคเดพเดชเด‚), criticism, missed opportunities, alternate past history เดŽเดจเตเดจเดฟเดต เดชเตเดฐเด•เดŸเดฟเดชเตเดชเดฟเด•เตเด•เดพเตป เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเต.

### Structure (เดฐเต‚เดชเด‚)
**If + Subject + had + V3, Subject + would have + V3**

– If clause-เตฝ **Past Perfect** (had gone, had studied)
– Main clause-เตฝ **would have + past participle** (would have passed, would have bought)

**เดจเต†เด—เดฑเตเดฑเต€เดตเต**: If + had not (hadnโ€™t), wouldnโ€™t have

**เด‡เดจเตเดฑเตผเดšเตเดšเต‡เดžเตเดšเต**: Main clause เด†เดฆเตเดฏเด‚ เดตเดจเตเดจเดพเดฒเตเด‚ เดถเดฐเดฟ (comma เดตเต‡เดฃเตเดŸ).

—

### 1. Basic Scenarios with Examples

**Scenario 1: Missed Opportunity (เดจเดทเตเดŸเดชเตเดชเต†เดŸเตเดŸ เด…เดตเดธเดฐเด‚)**
– **Wrong**: If I studied hard, I passed the exam.
– **Correct**: If I **had studied** hard, I **would have passed** the exam.

**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดฏเดฅเดพเตผเดคเตเดฅเดคเตเดคเดฟเตฝ เดชเด เดฟเดšเตเดšเดฟเดฒเตเดฒ, เด…เดคเดฟเดจเดพเตฝ เดชเดฐเต€เด•เตเดท เดชเดพเดธเตเดธเดพเดฏเดฟเดฒเตเดฒ. Past-เดฒเต† เด’เดฐเต regret เด†เดฃเต เด‡เดคเต เด•เดพเดฃเดฟเด•เตเด•เตเดจเตเดจเดคเต.

**Scenario 2: Accident / Safety**
– **Correct**: If you **had worn** a helmet, you **wouldnโ€™t have got** injured so badly.

**Scenario 3: Relationship / Decision**
– **Correct**: If I **hadnโ€™t left** my job, I **would have been** promoted by now.

**Scenario 4: Historical / Hypothetical Past**
– **Correct**: If Hitler **hadnโ€™t attacked** Russia, World War II **might have ended** differently.

—

### 2. Detailed Real-Life Scenarios (เดตเดฟเดถเดฆเดฎเดพเดฏ เด‰เดฆเดพเดนเดฐเดฃเด™เตเด™เตพ)

**Scenario 1: Exam / Career**
– If she **had prepared** well for the interview, she **would have got** the job.
– If I **hadnโ€™t wasted** time on social media, I **would have completed** my project on time.

**Scenario 2: Health & Lifestyle**
– If he **had stopped** smoking earlier, he **wouldnโ€™t have developed** lung problems.
– If we **had exercised** regularly, we **would have been** fitter now.

**Scenario 3: Travel / Journey**
– If the flight **hadnโ€™t been delayed**, we **would have reached** home before midnight.
– If I **had known** about the traffic, I **would have taken** the train instead.

**Scenario 4: Money & Finance**
– If I **had invested** in shares in 2020, I **would have become** a millionaire by now.
– If she **hadnโ€™t spent** all her savings, she **could have bought** a house.

**Scenario 5: Regret about Past Relationships**
– If he **had listened** to me, we **wouldnโ€™t have broken** up.
– If I **had told** her the truth earlier, she **might have forgiven** me.

**Scenario 6: Natural Calamity / Safety**
– If the government **had taken** precautions, many lives **could have been saved** in the flood.
– If you **hadnโ€™t gone** out in the heavy rain, you **wouldnโ€™t have caught** a cold.

—

### 3. Mixed Conditionals (Third + Second)

เดšเดฟเดฒเดชเตเดชเต‹เตพ Third Conditional-เดจเต‹เดŸเต Second Conditional เด•เต‚เดŸเดฟ เดšเต‡เตผเด•เตเด•เดพเดฑเตเดฃเตเดŸเต (past action-เดจเตเดฑเต† present result):

– If I **had studied** medicine, I **would be** a doctor now.
– If she **hadnโ€™t married** him, she **would be** happier today.

—

### 4. Common Errors in Third Conditional (Error Detection)

| Wrong Sentence | Correct Sentence | Reason |
|———————————————|—————————————————-|——–|
| If I would have known, I would help you. | If I **had known**, I **would have helped** you. | “would have” in if-clause เดคเต†เดฑเตเดฑเต |
| If he studied harder, he passed. | If he **had studied** harder, he **would have passed**. | Past Perfect เดตเต‡เดฃเด‚ |
| If she hadnโ€™t came late, we won. | If she **hadnโ€™t come** late, we **would have won**. | V3 “come” |
| If I had money, I would bought a car. | If I **had had** money, I **would have bought** a car. | Double “had” |
| If they didnโ€™t miss the train, they reached. | If they **hadnโ€™t missed** the train, they **would have reached**. | Full structure |

**Very Common Mistake**:
– **Wrong**: If I would have worked hardโ€ฆ
– **Correct**: If I **had worked** hardโ€ฆ

—

### 5. Advanced / Tricky Examples (Exams-เตฝ เดตเดฐเตเดจเตเดจ เดคเดฐเด‚)

1. If the driver **had been** more careful, the accident **could have been avoided**.
2. She **would have reached** the airport on time if she **hadnโ€™t forgotten** her passport.
3. If only I **had listened** to my parentsโ€™ advice!
4. Had I known about the problem earlier, I **would have solved** it. (Inversion โ€“ If เด’เดดเดฟเดตเดพเด•เตเด•เดฟ)
5. We **might have won** the match if our best player **hadnโ€™t been** injured.

—

### 6. Practice Set โ€“ Spot the Error / Correct the Sentence

1. If you would have called me, I will come to help you.
2. If she studied medicine, she became a famous doctor.
3. If I hadnโ€™t went there, this problem wouldnโ€™t happened.
4. Had the teacher explained clearly, students understood the topic.
5. If they had arrived earlier, they would see the beautiful sunset.
6. I would have finished the work if I have more time yesterday.
7. If he didnโ€™t lie to me, I would trust him now.
8. If only she had told the truth, everything was fine.

(เดถเดฐเดฟเดฏเดพเดฏ เดฐเต‚เดชเด™เตเด™เตพ เดตเต‡เดฃเดฎเต†เด™เตเด•เดฟเตฝ เดชเดฑเดฏเต‚ โ€“ เดžเดพเตป เดตเดฟเดถเดฆเดฎเดพเดฏเดฟ เดคเดฐเดพเด‚)

—

### Pro Tips for Using Third Conditional

– เด‡เดคเต regret, criticism, relief, speculation เดŽเดจเตเดจเดฟเดตเดฏเตเด•เตเด•เต เดเดฑเตเดฑเดตเตเด‚ เดจเดฒเตเดฒเดคเต.
– โ€œIf onlyโ€ฆโ€ เด‰เดชเดฏเต‹เด—เดฟเดšเตเดšเต strong regret เด•เดพเดฃเดฟเด•เตเด•เดพเด‚.
– โ€œMight have / Could haveโ€ เด‰เดชเดฏเต‹เด—เดฟเดšเตเดšเต possibility เดฎเดพเดฑเตเดฑเดพเด‚ (100% sure เด…เดฒเตเดฒเดพเดคเตเดคเดชเตเดชเต‹เตพ).
– Formal writing-เตฝ โ€œHad + subject + V3โ€ inversion เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดพเด‚ (If เด’เดดเดฟเดตเดพเด•เตเด•เดฟ).
– เด’เดฐเต paragraph-เตฝ Third Conditional เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดฎเตเดชเต‹เตพ tense consistency เดจเต‹เด•เตเด•เตเด•.

**Mixed Conditionals โ€“ เดตเดฟเดถเดฆเดฎเดพเดฏ เด—เตˆเดกเต & เด‰เดฆเดพเดนเดฐเดฃเด™เตเด™เตพ**
(เด‡เด‚เด—เตเดฒเต€เดทเต Grammar-เตฝ Mixed Conditionals)

**Mixed Conditionals** เดŽเดจเตเดจเดคเต เดฐเดฃเตเดŸเต‹ เด…เดคเดฟเดฒเดงเดฟเด•เดฎเต‹ conditionals (Zero, First, Second, Third) เด’เดฐเต เดตเดพเด•เตเดฏเดคเตเดคเดฟเตฝ เด•เดฒเตผเดคเตเดคเดฟ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเดคเดพเดฃเต. เด‡เดคเต **past action-เดจเตเดฑเต† present/future result** เด…เดฒเตเดฒเต†เด™เตเด•เดฟเตฝ **present situation-เดจเตเดฑเต† past result** เดชเดฑเดฏเดพเตป เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเดจเตเดจเต.

### เดชเตเดฐเดงเดพเดจ เดคเดฐเด™เตเด™เตพ (Main Types)

#### Type 1: Third Conditional (If-clause) + Second Conditional (Main clause)
**Structure**:
**If + had + V3, would + base verb**
(เดญเต‚เดคเด•เดพเดฒเดคเตเดคเดฟเดฒเต† เด’เดฐเต action เด‡เดชเตเดชเต‹เดดเดคเตเดคเต† เดธเตเดฅเดฟเดคเดฟเดฏเต† เดฌเดพเดงเดฟเด•เตเด•เตเดจเตเดจเดคเต)

**Use**: Past-เตฝ เดŽเดจเตเดคเต‹ เดšเต†เดฏเตเดคเดฟเดฒเตเดฒ/เดšเต†เดฏเตเดคเต เดŽเดจเตเดจเดคเต เด‡เดชเตเดชเต‹เดดเดคเตเดคเต† present situation-เดจเต† เดฎเดพเดฑเตเดฑเดฟเดฏเดฟเดฐเดฟเด•เตเด•เตเดจเตเดจเต.

**Detailed Examples:**

1. **If I had studied medicine**, I **would be** a doctor now.
**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดญเต‚เดคเด•เดพเดฒเดคเตเดคเต เดฎเต†เดกเดฟเดธเดฟเตป เดชเด เดฟเดšเตเดšเดฟเดฐเตเดจเตเดจเต†เด™เตเด•เดฟเตฝ เด‡เดชเตเดชเต‹เตพ เดกเต‹เด•เตเดŸเดฑเดพเดฏเดฟเดฐเดฟเด•เตเด•เตเดฎเดพเดฏเดฟเดฐเตเดจเตเดจเต. (Past action โ†’ Present result)

2. **If she hadnโ€™t married** him, she **would be** happier today.
**เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เดตเดฟเดตเดพเดนเด‚ เดšเต†เดฏเตเดคเดคเต past-เตฝ, เด…เดคเดฟเดจเตเดฑเต† เดซเดฒเด‚ เด‡เดชเตเดชเต‹เดดเดคเตเดคเต† unhappiness.

3. **If they had won** the lottery last year, they **would be** living in a mansion now.

4. **If he had listened** to his parents, he **wouldnโ€™t be** struggling financially at present.

5. **If I hadnโ€™t wasted** so much time in my youth, I **would have** a better career today.

—

#### Type 2: Second Conditional (If-clause) + Third Conditional (Main clause)
**Structure**:
**If + Past Simple, would have + V3**

**Use**: เด‡เดชเตเดชเต‹เดดเดคเตเดคเต† unreal situation-เดจเตเดฑเต† เดซเดฒเด‚ เดญเต‚เดคเด•เดพเดฒเดคเตเดคเต เดตเตเดฏเดคเตเดฏเดธเตเดคเดฎเดพเดฏเดฟเดฐเดฟเด•เตเด•เตเดฎเดพเดฏเดฟเดฐเตเดจเตเดจเต.

**Detailed Examples:**

1. **If I were** rich, I **would have bought** that car last month.
**เดฎเดฒเดฏเดพเดณ เดตเดฟเดถเดฆเต€เด•เดฐเดฃเด‚**: เด‡เดชเตเดชเต‹เตพ boomer rich เด†เดฃเต†เด™เตเด•เดฟเตฝ เด•เดดเดฟเดžเตเดž เดฎเดพเดธเด‚ เด† เด•เดพเตผ เดตเดพเด™เตเด™เดฟเดฏเต‡เดจเต‡.

2. **If she were** more careful, she **wouldnโ€™t have missed** the opportunity yesterday.

3. **If he had** better English, he **would have passed** the interview last week.

4. **If we knew** the road, we **wouldnโ€™t have got** lost yesterday.

5. **If I didnโ€™t have** so much work now, I **would have joined** you on the trip last weekend.

—

### 3. Real-Life Scenarios (เดตเดฟเดตเดฟเดง เดฎเต‡เด–เดฒเด•เดณเดฟเตฝ)

**Education / Career:**
– If I **had worked** harder in school, I **would be** in a top company now.
– If she **were** more confident, she **would have asked** for a promotion earlier.

**Health & Lifestyle:**
– If he **hadnโ€™t smoked** for so many years, he **would be** healthy today.
– If I **exercised** regularly, I **wouldnโ€™t have gained** so much weight last year.

**Finance & Money:**
– If we **had invested** early, we **would be** financially independent now.
– If I **were** smarter with money, I **wouldnโ€™t have lost** everything in that business.

**Relationships:**
– If I **had been** more understanding, we **would still be** together.
– If she **didnโ€™t love** him so much, she **would have left** him long ago.

**History / Hypothetical:**
– If Columbus **hadnโ€™t discovered** America, the world **would be** very different today.
– If the internet **hadnโ€™t been invented**, we **would still be** sending letters.

—

### 4. Common Errors in Mixed Conditionals (Error Detection)

| Wrong Sentence | Correct Sentence | Reason |
|—————————————————–|—————————————————————|——–|
| If I would have studied, I will be a doctor now. | If I **had studied**, I **would be** a doctor now. | Mixed structure เดคเต†เดฑเตเดฑเดฟ |
| If she was rich, she would bought the house. | If she **were** rich, she **would have bought** the house. | were + would have |
| If I had time yesterday, I will come. | If I **had had** time yesterday, I **would have come**. | Past Perfect needed |
| If he didnโ€™t lie, this problem wouldnโ€™t happened. | If he **hadnโ€™t lied**, this problem **wouldnโ€™t have happened**. | Full Third in if-clause |
| If I know the answer, I would have told you. | If I **knew** the answer, I **would have told** you. | Second + Third |

**Very Common Mistake**:
– **Wrong**: If I would have knownโ€ฆ
– **Correct**: If I **had known**โ€ฆ (Third) or If I **knew**โ€ฆ (Second)

—

### 5. Advanced & Tricky Examples

1. **Had I known** about the consequences, I **would be** living a peaceful life now. (Inversion)
2. If only I **were** taller, I **would have become** a basketball player.
3. She **would be** smiling today if she **hadnโ€™t failed** the exam last year.
4. If the weather **were** better, the farmers **would have harvested** more crops.
5. We **wouldnโ€™t be** in this situation now if the government **had acted** quickly.

—

### 6. Practice Set โ€“ Identify & Correct Mixed Conditionals

1. If I had more money, I will buy a house last year.
2. If she studied harder, she would be a doctor now.
3. If he were honest, this problem wouldnโ€™t happened.
4. If I had known you were coming, I prepare dinner.
5. If we were friends, I would have helped you yesterday.
6. If she didnโ€™t waste time, she would be successful today.
7. Had you told me earlier, I will not worry now.
8. If I am you, I would have apologized long ago.

(เดถเดฐเดฟเดฏเดพเดฏ เด‰เดคเตเดคเดฐเด™เตเด™เตพ เดตเต‡เดฃเดฎเต†เด™เตเด•เดฟเตฝ เดชเดฑเดฏเต‚ โ€“ เดžเดพเตป เดตเดฟเดถเดฆเดฎเดพเดฏเดฟ เดคเดฐเดพเด‚)

—

### Pro Tips for Mixed Conditionals

– Past โ†’ Present result = **If + Past Perfect, would + base verb**
– Present โ†’ Past result = **If + Past Simple, would have + V3**
– โ€œWereโ€ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เตเด• โ€œwasโ€ เดชเด•เดฐเด‚ (formal English-เตฝ)
– โ€œHad hadโ€ (double had) เดšเดฟเดฒเดชเตเดชเต‹เตพ เดตเดฐเตเด‚ โ€“ เด…เดคเต เดถเดฐเดฟเดฏเดพเดฃเต.
– Context เดจเต‹เด•เตเด•เดฟ เดเดคเต mix เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดฃเดฎเต†เดจเตเดจเต เดคเต€เดฐเตเดฎเดพเดจเดฟเด•เตเด•เตเด•.
– Writing & Speaking-เตฝ mixed conditionals เด‰เดชเดฏเต‹เด—เดฟเดšเตเดšเดพเตฝ เดจเดฟเด™เตเด™เดณเตเดŸเต† English advanced เด†เดฃเต†เดจเตเดจเต เดคเต‹เดจเตเดจเตเด‚.

ย 

Regular practice เดšเต†เดฏเตเดคเดพเตฝ Mixed Conditionals เดคเต†เดฑเตเดฑเตเด•เตพ เดŽเดณเตเดชเตเดชเดคเตเดคเดฟเตฝ เด•เดฃเตเดŸเตเดชเดฟเดŸเดฟเด•เตเด•เดพเดจเตเด‚ เดถเดฐเดฟเดฏเดพเดฏเดฟ เด‰เดชเดฏเต‹เด—เดฟเด•เตเด•เดพเดจเตเด‚ เด•เดดเดฟเดฏเตเด‚!