Change these sentences to the passive voice : 1. My students have met their friend at the station. 2.They didnt allow Tom to take these books home. 3. The teacher wont correct exercises tomorrow. 4. How many trees did they cut down ? 5. This well-known library attracts many people. 6. All students attended the meeting. 7. People say that he is intelligent. 8. He cant repair my bike. 9. Mary has operated Tom since 10 oclock. 10. Smith has taught us French for 2 years. 11. They didnt look after the children properly. 12. Nobody swept this street last week. 13. People drink a great deal of tea in England. 14. People speak English all over the world. 15. Tom was writing 2 poems. 16. She often takes her dog for a walk. 17. She didnt introduce me to her mother. 18. Farmers usually milk cows twice a day. 19. He likes people to call him sir. 20. Our teacher used to bid us talk in class.

1.My students' friends has been met at the station.
Bị động HTHT : O +has/have +been+Ved/VpII (+by S )
2.Tom wasn't allowed to taken these books home
Bị động QKĐ: O+wasn't/weren't+Ved/VpII (+by S )
3.Exercises won't be corrected by the teacher tomorrow
Bị động TLĐ: O + won't +be +Ved/VpII +(by S)
4.How many trees were cut down?
Bị động QKĐ : Was/Were+O+Ved/VpII+(by S)
5. Many people are attracted by this well-known library.
Bị động HTĐ : O+is/am/are+Ved/VpII (+by S)
6. The meeting was attended (by all students).
Bị động thì QKĐ :O+was/were+Ved/VpII (+by S )
7.He is said to be intelligent
Bị động HTĐ: O+is/am/are+Ved/VpII (+by S)
8. My bike can't be repaired by him.
Bị động với ĐTKT : S + ĐTKT + be +Ved/VpII
9. Tom has been operated by Mary since 10 o'clock.
Bị động HTHT
10. We have been taught French (by Mr. Smith) for 2 years.
Bị động HTHT
11.The children weren't looked after properly
Bị động QKĐ
12. This street wasn't swept last week.
Bị động QKĐ
13. A great deal of tea is drunk in England.
Bị động HTĐ
14. English is spoken all over the world.
Bị động HTĐ
15.2 poems was being written by Tom
Bị động thì QKTD:O+was/were+being+Ved/VpII+(byS)
16.Her dog is often taken for a walk
Bị động HTĐ
17.I wasn't introduced to her mother
Bị động QKĐ
18.Cows are usually milked by farmers twice a day
Bị động HTĐ
19.He likes to be called "Sir"
20.We used to be bidden talk in class by our teacher
Bị động ĐTKT