Bạn tham khảo:

1. They don't let us cycle in the park. (allow)

-> We are not allowed to cycle in the park. (be allowed to V_infinitive: được phép làm gì)

2. He left in the morning and I saw it.

-> I saw him leave in the morning. (see sb + V_infinitive: thấy ai làm gì (chứng kiến cả quá trình))

3. I started working in this hotel six months ago. (worked)

-> I have worked in this hotel for six months. (thì hiện tại hoàn thành: S + have/ has + P2 + for + khoảng thời gian)

4. Jimmy got into his car and drove away. I saw this.

-> I saw Jimmy get into his car and drive away. (see sb + V_infinitive: thấy ai làm gì (chứng kiến cả quá trình))

5. He did his homework then he went to bed.

-> After he had done his homework, he went to bed. (dùng thì quá khứ hoàn thành diễn tả hành động xảy ra trước hành động khác trong quá khứ)

=>

IV/

1. We are not allowed to cycle in the park.

-> allow sb to V ~ let sb V

2. I saw him leave in the morning.

-> see sb V

3. I have worked in this hotel for six months.

-> chuyển QKĐ sang HTHT, S have/has V3/ed, for + khoảng thời gian

4. I saw Jimmy get into his car and drive away.

-> see sb V

5. After he had done his homework, he went to bed.

-> after QKHT, QKĐ

V /

1. had eaten

-> after QKHT, QKĐ

2. being

-> enjoy Ving : yêu thích

3. were walking

-> when QKTD, QKĐ