Giúp mình với ạaaaaa

`@` Câu tường thuật dạng W.H Questions : S + asked (O)/wondered/wanted to know + W.H + S + V(lùi thì) + O

`33,` Ngoan asked what Mr.Minh had been doing at that time the day before.

- Lùi thì : QKTD -> QKHTTD

- Luì trạng từ : this -> that , yesterday -> the day before

`34,` One of the boys wanted to know what had happened to Mr.Budd the previous evening.

- Lùi thì : QKĐ -> QKHT

- Lùi trạng từ : yesterday evening -> the previous evening 

`35,` The men asked Mary how long she had waited for that doctor.

- Lùi thì : HTHT -> QKHT

- Lùi trạng từ : this -> that

`36,` I asked the saleman how much that dress cost that day.

- Lùi thì : HTĐ -> QKĐ

- Lùi trạng từ : today -> that day

`37,` Betty wonders when she sent a letter to her parents. 

- Đổi ngôi : I -> she , my -> her

*Động từ trần thuật wonders ở hiện tại nên thì không lùi.

`38,` I asked you what you were writting then.

- Lùi thì : HTTD -> QKTD

- Lùi trạng từ : now -> then