1 studied 

`->` when he was at university : hành động xảy ra trong quá khứ -> thì QKĐ

2 stopped 

(Vế trước là QKĐ,vế sau là QKĐ qua từ nối so)

3 tried 

(Giải thích giống câu 2 qua từ nối but)

4 rescued

5 jumped

6 walked 

`->` last night -> thì QKĐ

7 closed 

8 started 

`->` ten minutes ago -> thì QKĐ

9 asked

`->` yesterday this morning -> thì QKĐ

10 laughed 

`-> ` Sự hòa hợp của thì

1. My father studied Math when he was at university 

2. We were very tired so we stopped walking 

3. I  tried to pick the bag up, but it was very heavy

4. The firemen rescued the woman from the burning house

5. The cat jumped up into the free

6. After the film, we went home

7. It was very cold so we closed the window

8. You are late ! The lesson started ten minutes ago

9. The teacher asked a lot of questions yesterday

10. The programme was very funny, we laughed a lot

    Chúc bạn học tốt 😘😘