`1`

`(-)` Quynh didn't use to be my best friend

`(?)` Did Quynh use to be my best friend ? 

`2` 

`(-)` Duong didn't use to have lots of money

`(?)` Did Duong use to have lots of money

`3` 

`(-)` Jin didn't use to have interest in her hobbies

`(?)` Did Jin use to have interest in her hobbies

`4` 

`(-)` Anna didn't use to live with her parents

`(?)` Did Anna use to live with her parents ?

`5` My mothe didn't use to live in Ha Long when she were young

`(?)` Did my mother use to live in Ha Long when she were young ?

Giải thích

Cấu trúc

`(+)` S + used to + V-inf

`(-)` S + didn't + use to + V-inf

`(  ?  )` Did + S + use to + V-inf ?

Chuyển sang câu phủ định (`-`) và câu hỏi (`?`):

1. Quynh used to be my best friend.

(`-`) ⇒ Quynh didn't use to be my best friend.

(`?`) ⇒ Did Quynh use to be your best friend?

2. Duong used to have lots of money.

(`-`) ⇒ Duong didn't use to have lots of money.

(`?`) ⇒ Did Duong use to have lots of money?

3. Jin used to have an interest in her hobbies.

(`-`) ⇒ Jin didn't use to have an interest in her hobbies.

(`?`) ⇒ Did Jin use to have an interest in her hobbies?

4. Anna used to live with her parents.

(`-`) ⇒ Anna didn't use to live with her parents.

(`?`) ⇒ Did Anna use to live with her parents?

5. My mother used to live in Ha Long Bay when she was young.

(`-`) ⇒ My mother didn't use to live in Ha Long Bay when she was young.

(`?`) ⇒ Did my mother use to live in Ha Long when she was young?

//Có vài câu đề sai ngữ pháp nên mình xin phép được sửa đề để hợp ngữ pháp của bài ạ!//

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