The passive voice
- Active: Mr Smith taught English.
- Passive: English was taught by Mr Smith.
I/ Qui tắc:
1. Tân ngữ chủ động (active object)-chủ ngữ bị động (pasive subject).
2. Động từ bị động ( pasive verb).
Be + past participle
* Nếu động từ chủ động (active verb) ở thì Simple present hoặc Simple past,
thì dạng của động từ bị động là:
Am, Is, Are
+ Past Participle.
Was, Were
Ex:
1. John delivers the newspapers every morning.
- The newspapers are delivered by John every morning.
2. My mother wrote that letter.
- That letter was written by my mother.
* Nếu động từ chủ động ở thì Present Continuous hoặc Past Continuous thì
dạng động từ bị động sẽ là:
Am, Is, Are
+ Being + Past Participle.
Was, Were
Ex:
1. He is asking me a lot of questions.
- I am being asked a lot of questions.
2. She was doing her homework at that time.
- Her homework was being done at that time.
* Nếu động từ chủ động ở thì Present Perfect hoặc Past Perfect, thì dạng
động từ bị động là:
Have, Has, Had + Been + Past Participle.
Ex:

+ Her sister was given the car.
+ The car was given to her sister.
II/ Exercise : Chuyển các câu sau sang thể bị động.
1. The teacher explains the lesson.
- The lesson is explained by the teacher.
2. Mrs Green is cooking the food in the kichen.
- The food is being cooked in the kichen by Mrs Green.
3. The doctor examined the patients.
- The patients are examined by the doctor
4. These boys made that noise.
- That noise was made by these boys.
5. People speak English all over the world.
- English is spoken all over the world.
6. He gave him back the money last Sunday.
- He was given the money back last Sunday.
7. I cant do these exercises quikly.
- These exercises cant be done quikly.
8. She had finished the report by noon.
- The report had been finished by noon.
9. The movie has disappointed us very much.
- We have been disappointed very much by the movie.
10. They havr to pay the bill before the first of the month.
- The bill has to be paid before the first of the month.
11. They will ask you several questions.
- You will be asked several questions.
12. The police are holding him for further questioning.
- He is being held for further questioning by the police.
13. My parents promised me a bicycle two days ago.
- I was promised a bicycle by my parents two days ago.
14. Somebody has locked the box and can’t open it.