1. went - had finished (quá khứ đơn - quá khứ hoàn thành)

2. were playing - came (hành động đang xảy ra - hành động cắt ngang)

3. had already seen (câu tường thuật, lùi thì)

4. came - had already begun (thì quá khứ đơn - quá khứ hoàn thành)

5. was sitting - saw (hành động đang xảy ra - hành động cắt ngang)

6. hadn't eaten

7. asked - had came

8. went - sat - rested

9. watched - had done

10. went

11. won

12. was he doing - was

13. had ever seen

14. had gone- went

15. told - had visited

16. saw - was standing

17. had already started

18. went - had called

19. rang - was having

20. agreed

21. were you doing

22. had happened

23. had taught - left

24. rang - was taking

1/going/finished

2/play/came

3/has already seen

4/came/has already begun

mình chỉ làm đc thế thôi