mn oi giúp e với ạ

Change these sentences into passive (simple past)

Thì QKĐ - bị động:

(+) S+ was/were+ V3/ed

(-) S + was/were+  not + V3ed

(?)Was/Were + S+V3/ed?

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14. Were these books returned to the library?

15. He wasn't known well.

16. This shirt wasn't cleaned.

17. You were paid in ten days.

18. Your health wasn't improved with more exercise.

19. The law was obeyed in this city.

20. Was the kitchen floor cleaned by the cleaner?

21. She was helped with the housework.

22. I was robbed by a pickpocket last week.

23. This road wasn't used very often.

24. The kids were chased by a dog.

25. I was sent an invitation for his birthday party by my friend last Monday.

26. A new barn was built near this place by the farmer three months ago.

27. Mrs. Jones was given some letters by the secretary.

28. A lot of trees weren't grown in the parks.

29. Our door was broken down last night.

30. He was chosen as the best actor of the year.

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