Giải bài tập:

1. They are interested in learning English. -> English is being learned by them.

2. We are teaching a very kind of singing. -> A very kind of singing is being taught by us.

3. The holiday lasts two weeks. -> Two weeks is the duration of the holiday. (Câu này không chuyển sang bị động được một cách tự nhiên vì chủ ngữ là "The holiday" mang nghĩa chung chung và không thể thực hiện hành động.)

4. She has been a teacher since she was 22. -> She has been a teacher since she was 22. (Câu này không thể chuyển sang bị động vì "be" ở đây là động từ liên kết, không diễn tả hành động.)

5. On the way to the village, we saw a big hotel. -> A big hotel was seen on the way to the village by us.

6. What will the weather be in HOCHIMINH city on July 20th? -> What will the weather be like in HOCHIMINH city on July 20th? (Câu hỏi này không thể chuyển sang bị động.)

7. I haven't seen him since I was a student. -> He hasn't been seen by me since I was a student.

8. English is spoken all over the world. -> (Câu này đã ở dạng bị động rồi)

9. They can cook this pudding in its tins. -> This pudding can be cooked in its tins by them.

10. My mother made those curtains. -> Those curtains were made by my mother.

11. They asked her about her new job. -> She was asked about her new job.

12. They have sold their car to pay their debt. -> Their car has been sold to pay their debt.

13. You mustn't use this machine after 5 pm. -> This machine mustn't be used after 5 pm.

14. The workers are building a supermarket. -> A supermarket is being built by the workers.

15. The zoo-keepers feed the animals twice a day. -> The animals are fed twice a day by the zoo-keepers.

16. She is cutting the cakes with a sharp knife. -> The cakes are being cut with a sharp knife by her.

17. They are selling newspapers. -> Newspapers are being sold.

18. She can speak four languages. -> Four languages can be spoken by her.

19. They are cutting the cakes with a sharp knife. -> The cakes are being cut with a sharp knife by them.

20. She can speak four languages. -> Four languages can be spoken by her.

• The holiday...lasts two weeks. (The verb "last" should be in its present form "lasts" to agree with "holiday.")

1. We are interested in learning English.
2. Our teacher is very kind to us.
3. Are they good at singing?
4. He was so ill that he cannot walk.
5. She has been a teacher since she was 22.
6. On the way to the village, we saw a big hotel.
7. My brother was born on July 20th in Ho Chi Minh City.
8. What will the weather be like?
9. I haven't seen him since I was a student.
10. English is spoken all over the world.

1. This pudding can be cooked in its tins.
2. Those curtains were made by my mother.
3. She was asked about her new job.
4. Their car has been sold to pay their debt.
5. This machine mustn't be used after 5 pm.
6. A supermarket is being built by the workers.
7. The animals are fed twice a day by the zoo-keepers.
8. The cakes are being cut with a sharp knife by her.
9. Newspapers are being sold.
10. Four languages can be spoken by her.