I

1 It is difficult to speak English fluently.

2 John used to smoke cigarettes when he was a young man.

3 If you get a bike unless you can't go to school.

4 Will you look after the flat while I'm away?

5 When I was young, I used to walk to school.

II

1 He could play the guitar when he was small.
2 My friend works fewer hours than I do.

3 Nga'mother wrote a sick note for her yesterday.

4 You must wash the spinach carefully.

III

1 He never plays games.

2 Mai is interested in computers.

3 How often does your practice the piano in Youth Club?

4 Would you like to go to the movie with me tonight?

1

1 It is difficult to speak English fluently.

2 John used to smoke cigarettes when he was a young man.

3 If you get a bike unless you can't go to school.

4 Will you look after the flat while I'm away?

take care of = look after.

5 When I was young, I used to walk to school.

6 câu hỏi sai nên mình ko làm nhé

2

1. He could play the guitar when he was small.

 - Vì có "when he was small" nên cụm trước nó chia ở thì quá khứ đơn.

Dịch: Anh ta có thể chơi đàn gui-ta khi anh ta còn nhỏ

2. My friend works fewer hours than I do.

 - fewer: ít hơn, dùng cho danh từ đếm được.

Dịch: Bạn của tôi làm việc ít hơn tôi làm.

3. Nga'mother wrote a sick note for her yesterday.

4. You must wash the spinach carefully.

3

1,he/never/play/sports

`=>` he never plays games.

2,Mai/be/interested/computers

`=>` Mai is interested in computers.

3,How often/sister/practice/piano/youth club/?

`=>` how often does your practice the piano in Youth Club?

4,You/like/go/movies/me/tonight/?

`=>` would you like to go to the movie with me tonight?