Chia động từ trong ngoặc :
1. saw/ was waiting
2. has been
3. has taught/graduated
4. doesn't watch
5. met
6. reported / had captured
7. thanked
8. has stolen
9. had lived/broke
10. was
11 am
12. was / had been
13. has driven/knew
14. speak
15. wags/sees
16. were .. doing/rang
17. have .. seen
18. hadn't seen
19. got
20. will leave/knows
21. was playing/arrived
22. will come /see
23. will come / Will ..be
24. will come
25. will .. spend
27. haven't been living
28. have never forgotten /have just told
29. are preparing
30. stayed /rode
31. told/had visited
32. has worked
33. worked
34. build/fly
35. have lost/Can
36. hasn't smoked
37. arrived/has just gone
38. have ..been
39. Have .. received
40. joined /was
41. Have .. remembered / forgotten
42. had studied
43. wrote
44. left / haven't heard
45. Did .. speak / haven't seen / couldn't remember / saw
46. was playing
47. discovered
48. will have finised
49. will have been living
50. did/ die / don't know / die
