Resposta:
1. is
2. do
3. can't
4. shoudn't
5. used to; don't
6. should
7. is going
8. will
9. don't have to walk
11. will
12. must; will
13. can't
14. haven't told
15. didn't hear
16. learned how to swim
17. shouldn't
18. didn't
19. didn't
20. will
21. can
22. have
23. should
24. can
25. would have come
26. used to wear
27. will
28. can't
29. can't
30. will not
31. couldn't have seen
Explicação:
Espero ter ajudado, me desculpe se tiver algum erro:)
