1

- He hasn't been an English teacher for 20 years.

- Has he been an English teacher for 20 years ?

2

- We aren't having an English test next Monday.

- Are you having an English test next Monday ?

3

- The people weren't friendly.

- Were the people  friendly ?

4

- Liz didn't enjoy her summer vacation last year.

- Did Liz enjoy her summer vacation last year ?

5, 

- Nam won't be absent from school tomorrow.

- Will Nam be absent from school tomorrow ?

6

- My brother hasn't ever spent his summer holiday in England.

- Has my brother ever spent his summer holiday in England ?

Đáp án:

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1. He has been an English teacher for 20 years.

⇒(-) He hasn't been an English teacher for 20 years.

⇒(?) Has he been an English teacher for 20 years?

2. We are having an English test next Monday.

⇒(-) We aren't having an English test next Monday.

⇒(?) Are we having an English test next Monday.

3. The people were friendly.

⇒(-) The people weren't friendly.

⇒(?) Were the people friendly?

3. Liz enjoyed her summer vacation last year.

⇒(-) Liz didn't enjoy her summer vacation last year.

⇒(?) Did Liz enjoy her summer vacation last year?

4. Nam will be absent from school tomorrow.

⇒(-) Nam won't be absent from school tomorrow.

⇒(?) Will Nam be absent from school tomorrow?

5. She goes to the gym twice a week.

⇒(-) She doesn't go to the gym twice a week.

⇒(?) Does she goes to the gym twice?

6. My brother has ever spent his summer holiday in England.

⇒(-) My brother hasn't ever spent his summer holiday in England.

⇒(?) Has my brother ever spent his summer holiday in England?