1. could;

2. see;

3. stood;

4. played;

5. was sitting/sat;

6. saw;

7. saw;

8. were passing/passed;

9. were putting/put;

10. gave/were giving;

11. thought;

12. would have;

13. stopped;

14. came;

15. asked;

16. have just stopped;

17. am;

18. answered;

19. have played;

20. has given;

21. said;

22. shall help;

23. give;

24. told;

25. began;

26. was playing;

27. were gathering/gathered;

28. heard;

29. falling/fall;

30. had never had;

31. thought

32. plays/could play;

33. shall not have;

34. were listening/listened;

35. is playing/plays;

36. was;

37. did not know;

38. was;

39. had never met