Exercise 2: Turn the following sentences into the passive. 1. The cold weather damaged the plants. .......................................... 2. They will finish their work next week. ................................. 3. The flood has caused considerable damage. ..................................... 4. They haven't decided anything yet. ...................................... 5. John is calling the other members. ..................................... 6. We recycled old car tires to make shoes and sandals. ................................. 7. Lan gave me a beautiful present on my birthday. ................................ 8.People cut down billions of trees to make paper. ........................................... 9. They collect used glass and send it to factories. ............................................... 10. She can make lots of beautiful toys from recycled plastic. ............................................

Để chuyển câu từ dạng chủ động sang dạng bị động, chúng ta cần làm những bước sau:
1. Xác định đối tượng của câu hoặc câu với đại từ không xác định.
2. Đặt đối tượng đó lên trước và sử dụng thì bị động của động từ cần chuyển.

Ví dụ, chuyển dạng bị động từ câu 1:
1. The cold weather damaged the plants.
(Câu chủ động)
2. The plants were damaged by the cold weather.
(Câu bị động)

Câu trả lời cho 10 câu trên sẽ như sau:
1. The plants were damaged by the cold weather.
2. Their work will be finished next week.
3. Considerable damage has been caused by the flood.
4. Nothing has been decided yet by them.
5. The other members are being called by John.
6. Old car tires were recycled to make shoes and sandals by us.
7. I was given a beautiful present on my birthday by Lan.
8. Billions of trees are cut down by people to make paper.
9. Used glass is collected and sent to factories by them.
10. Lots of beautiful toys can be made from recycled plastic by her.