`1.` Don't forget to iron your own clothes.

`-` Cấu trúc:

`+` Remember to V: Nhớ làm gì.

`=` Don't forget to V: Đừng quên làm gì.

`2.` What's the matter with her?

`-` Cấu trúc:

`+` What + to be + wrong with + N?

`=` What + to be + the matter with + N?

`=>` Hỏi về tình trạng sức khoẻ.

`3.` He doesn't like the sound of the drill at the dentist's.

`-` hate (v): ghét `=` aux V + not + like (v): không thích

`-` Thì hiện tại đơn: S + don't/ doesn't + Vinf.

`4.` Doing morning exercises is useful.

`-` Cấu trúc:

`+` It + to be + adj + to V.

`=` V-ing + to be + adj.

`5.` Tuan didn't go to bed late last night.

`-` Thì quá khứ đơn:

$(+)$ S + Ved/ V2.

$(-)$ S + didn't + Vinf.

`-` early (adv): sớm >< late (adv): muộn