1. Cách chuyển từ câu chủ động sang câu bị động:


Ex: They are painting the house.

 → The house is being painted.

       They had destroyed all the documents when we arrived.

 → All the documents had been destroyed when we arrived.

2. Thay đổi hình thức động từ cụ thể trong từng thì:




1/ The manager must sign the cheque.

→ The cheque must be signed by the manager.

2/ My sister was baking the cakes.

→ The cakes were being baked by my sister.

3/ I got Harry to repair my car.

→ I got my car repaired by Harry.

4/ They say exercise is good for health.

→ It is said that exercise is good for health.

→ Exercise is said to be good for health.

5/ People believe that he was killed by terrorists.

→ He is believed to have been killed by terrorists.


- Trạng ngữ chỉ nơi chốn đứng trước “by + O”

Ex: He was found in the forest by the police.

- Trạng ngữ chỉ thời gian đứng sau “by + O”

Ex: The report was typed by the secretary this morning.

- Nếu chủ từ trong câu chủ động là các từ phủ định (no one, nobody, ) thì đổi sang dạng phủ định của câu bị động

Ex: No one can answer this question.

                 → This question can’t be answered.