1. were watching/failed
2. has changed/came
3. have spent/got
4. has
5. comes
6. was being
7. were you doing/rang
8. haven't seen
9. will come
10. had worked
11. discovered
12. are singing
13. Have...received
14. have...been
15. has asked
16. was watching
17. had done/went
18. is coming
19. haven't talked
20. felt/was doing
21. haven't seen
22. has been
23. have never seen
24. had met
25. did
26. have ever read
27. will come
29. own
30. were calling
31. has seen
32. have seen
33. have met
34. had left/became
35. have seen
36. have ever met
37. was
38. haven't lived
39. have never forgotten/had just told
40. are prepapring
41. stayed/rode/had borrowed
42. told/had visited
43. has worked
44. had worked
45. build/fly
46. lost
47. hasn't smoked
48. arrived/had just gone
49. have .... been
50. Have...received
