I. Change the following sentences from active voice into passive voice. 1.They had to cancel the flight because of the bad weather. 2.We must finish the project on time. 3. People can find a cure for cancer in the near future. 4.Someone might steal your bike if you leave it outside. 5. They ought to knock down the old building. 6. They held the 22 nd SEA Games in Viet Nam in 2003. 7. The teacher will explain the lesson until all the students understand it. 8. He has done his homework for hours but he hasn’t finished it yet. 9. My parents never make me work hard. 10. The brick – layers have been building a house in the village. 11. One of my neighbors has stolen my bicycle. 12. I have a hairdresser do my hair every day. 13. How often do you take the dog oout for a walk? – Every five hours. 14. My brother will give me a cat for my fifteenth birthday. 15. People rumoured that the King was afraid of his wife. 16. I am going to read her latest book. 17.They should tidy this room twice a week 18. Amazing news! Scientists have dicovered a new planet. 19. She made ten phone calls yesterday. 20.My daughter has to finish all her homework before school. 21. My sister gave me a new pair of jeans on my fifteenth birthday. 22. The workers are building a supermarket on our street. 23. The zoo keepers feed the animals twice a day. 24.They have sold their car to pay their debt. 25. We are going to grow flowers in the front garden. 26. You mustn’t use this machine after 5.30 pm 27. My grandmother is knitting a new sweater for me. 28. Did people make jeans two hundred years ago. 29.We don’t use this kind of cloth to make shirts. 30. Vietnamese women continue to wear the unique and fashionable ao dai. 31. The mechanic is repairing Judy’s car. 32. We must do something before it is too late. 33. They make these artificial flowers of sink. 34. Did they feed Lulu last night? 35. They used to drink beer for breakfast in England yeaers ago. 36. They were cleaning the floor when I arrived. II. Change the following sentences from the passive voice into active voice. 1. The robber were arrested by the police yesterday. -> 2. The match has been cancelled due to the bad weather. -> 3. The flowers need watering. -> 4. The documents will be sent as soon as possible. -> 5. We are often shouted at at work by our boss. -> 6. Two department stores have been built in the neighborhood this year. 7. I was made to wash the clothes by my mother. 8. She has her clothes made by a famous tailor. 9. It was believed that the earth was square. 10. He was rumoured to be mysterious. 11. I was given a new pair of jeans on my fifteenth birthday by my sister. 12. A supermarket on our street is being built on our street by the workers. 13. The animals are fed twice a day by the zoo keepers. 14.Their car has been sold to pay their debt by them. 15. Flowers are going to be grown in the front garden by us. 16. This machine mustn’t be used after 5.30 pm by you. 17. Is knitting a new sweater is being knitted for me by my grandmother. 18. Were jeans made two hundred years ago? 19.This kind of cloth isn’t used to make shirts by us. 20. The unique and fashionable ao dai continue to be worn by Vietnamese women. 22. The information is kept on our computer. (We) 23. As I was walking home, I thought I was being followed. (someone)

Để chuyển các câu từ câu bị động sang câu chủ động, ta cần chú ý thay đổi ngữ cảnh và nội dung câu.

Ví dụ với câu: "The robber were arrested by the police yesterday."
Chuyển sang câu chủ động: "The police arrested the robber yesterday."

Câu trả lời cho câu hỏi trên:

I. Change the following sentences from active voice into passive voice.
1. The flight had to be cancelled because of the bad weather.
2. The project must be finished on time.
3. A cure for cancer can be found in the near future by people.
4. Your bike might be stolen if you leave it outside.
5. The old building ought to be knocked down.
6. The 22nd SEA Games were held in Viet Nam in 2003.
7. The lesson will be explained by the teacher until all the students understand it.
8. His homework has been done for hours but it hasn't been finished yet.
9. I am never made to work hard by my parents.
10. A house has been built in the village by the brick-layers.
11. My bicycle has been stolen by one of my neighbors.
12. My hair is done by a hairdresser every day.
13. How often is the dog taken out for a walk? - Every five hours.
14. I will be given a cat for my fifteenth birthday by my brother.
15. It was rumoured that the King was afraid of his wife by people.
16. Her latest book is going to be read by me.
17. This room should be tidied twice a week.
18. A new planet has been discovered by scientists.
19. Ten phone calls were made by her yesterday.
20. All her homework has to be finished before school by my daughter.
21. A new pair of jeans was given to me on my fifteenth birthday by my sister.
22. A supermarket is being built on our street by the workers.
23. The animals are fed twice a day by the zoo keepers.
24. Their car has been sold to pay their debt.
25. Flowers are going to be grown in the front garden.
26. This machine mustn't be used after 5.30 pm.
27. A new sweater is being knitted for me by my grandmother.
28. Were jeans made two hundred years ago by people?
29. This kind of cloth isn't used to make shirts.
30. The unique and fashionable ao dai continue to be worn by Vietnamese women.
31. The mechanic is repairing Judy's car.
32. We must do something before it is too late.
33. These artificial flowers are made of silk by them.
34. Was Lulu fed last night by them?
35. Beer used to be drunk for breakfast in England years ago by people.
36. The floor was being cleaned when I arrived by them.

II. Change the following sentences from the passive voice into active voice.
1. The police arrested the robber yesterday.
2. Due to the bad weather, they cancelled the match.
3. We need to water the flowers.
4. We will send the documents as soon as possible.
5. Our boss often shouts at us at work.
6. They built two department stores in the neighborhood this year.
7. My mother made me wash the clothes.
8. A famous tailor makes her clothes.
9. People believed that the earth was square.
10. People rumoured him to be mysterious.
11. My sister gave me a new pair of jeans on my fifteenth birthday.
12. The workers are building a supermarket on our street.
13. The zoo keepers feed the animals twice a day.
14. The car was sold to pay their debt by them.
15. We are going to grow flowers in the front garden.
16. You mustn't use this machine after 5.30 pm.
17. My grandmother is knitting a new sweater for me.
18. Were jeans made two hundred years ago?
19. We don't use this kind of cloth to make shirts.
20. Vietnamese women continue to wear the unique and fashionable ao dai.
21. We keep the information on our computer.
22. Someone was following me as I was walking home.

Để chuyển từ câu hoạt động sang câu bị động, chúng ta thường sử dụng cấu trúc "be + past participle". Dưới đây là cách làm các câu trong phần I:

1. The flight had to be cancelled because of the bad weather.
2. The project must be finished on time.
3. A cure for cancer can be found in the near future.
4. Your bike might be stolen if it is left outside.
5. The old building ought to be knocked down.
6. The 22 nd SEA Games were held in Viet Nam in 2003.
7. The lesson will be explained by the teacher until all the students understand it.
8. His homework has been done for hours but it hasn't been finished yet.
9. I am never made to work hard by my parents.
10. A house has been built in the village by the brick-layers.
11. My bicycle has been stolen by one of my neighbors.
12. My hair is done every day by a hairdresser.
13. How often is the dog taken out for a walk? - Every five hours.
14. I will be given a cat for my fifteenth birthday by my brother.
15. It was rumoured that the King was afraid of his wife.
16. Her latest book is going to be read by me.
17. This room should be tidied twice a week.
18. A new planet has been discovered by scientists.
19. Ten phone calls were made by her yesterday.
20. All her homework has to be finished before school by my daughter.
21. A new pair of jeans was given to me on my fifteenth birthday by my sister.
22. A supermarket is being built on our street by the workers.
23. The animals are fed twice a day by the zoo keepers.
24. Their car has been sold to pay their debt.
25. Flowers are going to be grown in the front garden.
26. This machine mustn't be used after 5.30 pm.
27. A new sweater is being knitted for me by my grandmother.

Còn đối với phần II - chuyển từ câu bị động sang câu hoạt động, dưới đây là cách làm:

1. The police arrested the robber yesterday.
2. The bad weather has caused the cancellation of the match.
3. Someone needs to water the flowers.
4. We will send the documents as soon as possible.
5. Our boss often shouts at us at work.
6. Someone has built two department stores in the neighborhood this year.
7. My mother made me wash the clothes.
8. A famous tailor makes her clothes.
9. People believed that the earth was square.
10. People rumoured that he was mysterious.
11. My sister gave me a new pair of jeans on my fifteenth birthday.
12. The workers are building a supermarket on our street.
13. The zoo keepers feed the animals twice a day.
14. They have sold their car to pay their debt.
15. We are going to grow flowers in the front garden.
16. You mustn't use this machine after 5.30 pm.
17. My grandmother is knitting a new sweater for me.
18. Were jeans made two hundred years ago?
19. We don't use this kind of cloth to make shirts.
20. Vietnamese women continue to wear the unique and fashionable ao dai.
21. We keep the information on our computer.
22. Someone was following me as I was walking home.

The old building ought to be knocked down by them.

Your bike might be stolen if you leave it outside.

A cure for cancer can be found in the near future.