I

1. came (Khi John về nhà chúng tôi đã ăn xong rồi)

2. passed (câu có ''last year'' nên dùng quá khứ đơn)

3. was getting (hành động đang trong quá trình diễn ra)

4. bought (liệt kê các hành động diễn ra trong quá khứ)

5. had forgotten (hành động xảy ra trước một hành động khác trong quá khứ)

6. arrived (Khi chúng tôi đến ga, tàu đã rời đi rồi)

7. had broken (hành động xảy ra trước một hành động khác trong quá khứ)

8. got married (Tôi đã biết chồng tôi được ba năm khi chúng tôi kết hôn)

9. had cleaned

10.arrived

11. had started

12. had gone

13. haven't seen

14. had planned

15. had taken

16. hadn't mentioned

17. hadn't parked

18. had bought

19. had lost

II

1. When we arrived, David had gone home.

    After David had gone home, we arrived.

2. After we had had snack, we had a look around the shops.

3. Before I went to the zoo last year, I have never seen a real tiger.

4. ..., the woman was sleeping

12. After she had put on her make-up, she went to work.

13. Before he call the fire brigade, he noticed the smoked in the house.

14. When the guest knocked the door, I had set the table.