29. She often gives me a hand. 30. They buy us gifts on Sunday. 31. He bought me a bike. 32. She watched a movie.
33. We break the rules once a month. 34. She obeys the rules very well. 35. He learns math. 36. They write songs. 37. He takes care of us.
38. She listens to the teacher carefully in class.
Should have done 表示本应该干某事而没干，表一种愿望，批评，谴责等。Could have done本能够干某事而没干. 例如：1.He should have been here yesterday. 2. They should have done it well. 3. She should have finished it on time. 4. Jim could have arrived there by bus. 5. He shouldn’t have met the Internet friends. 6. She could have helped us.
7. I shouldn’t have made such foolish mistakes. 8. I made a cake. 9. He invented paper.
10. Shen Neng discovered tea by chance. 11. The chef invented Potato chips by accident. 12. He hurt her greatly.
13. They put the books here just now. 14. She invited me last week.
15. They did it very well. 感官性动词see/watch/hear/find/notice/feel,使让性动词let /make /have在主动句中如动原性做宾语补足语，改为被动时需在动原形前加to, 如：
16. He saw her leave here.---------She was seen to leave by him.
17. I found her run away.----------She was found _____________away by me.
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18. I heard him hum songs.---------He was heard __________________songs by me. 19. He watched her play the piano.She was watched _____________the piano. 20. I let him go home.----------He ____________________go home.
21. They made her stay here.---------She was made _________________here. 22. He had me read it again.--------I --------------------------------------it again.
23. They noticed the thief get on the bus.The thief __________________________on the bus.
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