Lm hộ rm vs các chj iu

`Đáp` `án:`

16. By whom were the children looked after?

17. How long has the doctor been waited for?

18. What time can the boys' paper be handed in?

19. Why wasn't he helped? 

20. Who is being kept in the kitchen?

30. The woman with a red hat was looked at by the children. 

31. My hat used to be pulled over my eyes. 

32. All my washing has been done by hand for the past years. 

33. A nest has been built in the porch by a pair of Robins since last week. 

34. The murderer hasn't been found yet by the police.

35. One of her paintings was sold at $1,000. 

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Bị động: 

- QKĐ: S + was/were + (not) + V3/ed ║ Was/Were  +S + V3/ed? 

- HTHT: S+ has/have + (not)+ been + V3/ed ║ Has/Have + S + been + V3/ed?

- Modal verbs: Modal verb + S +be + V3/ed?

- HTTD: Am/Is/Are + S + being + V3/ed?

- S + used to be + V3/ed

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