S: They

O: preparations

V: had finished

Passive: Preparations had been finished by this time the guests arrived

giúp mình với : Write passive and find S-O-V :

They (S) had finished (V) preparations (O) by this time the guests arrived

=> preparations had been finished by this time the guests arrived

By the end of the party, people had eaten all the food

Find S-O-V and write active :

By the end of the party all the food had been eaten.

All the food: S

eat: V

-> By the end of the party people had eaten all the food.

By the end of the party, people had eaten all the food

Đáp án D.
Hành động xảy ra trước dùng quá khứ hoàn thành, hành động xảy ra sau dùng quá khứ đơn. 
Dịch: Việc chuẩn bị đã được hoàn thành trước khi khách mời đến.

S: I 

V: have finished

O: the work

The work has been finished (by me) 

S : I

O : the work

V : have finished

The work has been finished 

S: I

O: the work

V: have finished

The work has been finished 

S: I

O: the work 

V: have finished

=> The work has been finished by me

People sell many illegal copies on the street corners. Còn tìm sov thì mấy bạn kia tìm rồi

VD:1. Somebody has taken my briefcase. 2. The teacher returned our written work to us. 3. She had finished her report by soon.

Bài tập này giúp em ôn luyện về cách chuyển câu chủ động sang câu bị động:

1.  Tìm tân ngữ của câu chủ động, viết lại thành chủ ngữ.

2.  Xác định động từ chia thì của câu, rồi chuyển nó thành thể bị động. (be + động từ dạng phân từ II)

3.  Xác định chủ ngữ của câu chủ động, chuyển ra cuối câu và thêm by vào phía trước.

Em hãy ghi nhớ kiến thức để lần tới gặp khỏi cần băn khoăn gì nhiều em nhé!

I/ Change the following sentences from active into passive form.

1. Somebody has taken my briefcase.=>……………My briefcase has been taken………………………………………………

2. The teacher returned our written work to us.=>…………Our written work was returned to us by the teacher……………………………………….

3. She had finished her report by soon.=>……………Her report had been finished by her……………………………………………….

4. The police have arrested five suspects.=>……………Five suspects have been arrested by the police…………………………………………….

5. The doctor ordered him to take a long rest.=>………………He was ordered to take a long rest by the doctor…………………………………………

6. A group of students have met their friends at the rail way station.

=>……………A group of students' friends have been met by them at the railway station………………………………………………………..

7. They didn’t allow Tom to take these books home.

=>…………Tom was not allowed to take these books home…………………………………………………..

8. The teacher won’t correct exercises tomorrow.

=>………Exercises won't be corrected by the teacher tomorrow……………………………………………………….

9. Marry has operated Tom since 10 o’clock.

=>………Tom has not been operated by Marry since 10 o'clock.……………………………………………………….

10. They didn’t look after the children properly.

=>………………The children were not looked after properly……………………………………………..

11. Nobody swept this street last week.=>………This street was not swept last week…………………………………………

12. People speak English all over the world.

=>……………English is spoken all over the world………………………………………………

13. Tom was writing two poems.=>……Two poems were written by Tom……………………………………………

14. She often takes her dog for a walk.=>………Her dog is often taken for a walk (by her)…………………………………………

15. They can’t make tea with cold water.=>…………Tea can't be made with cold water………………………………………

16. The chief engineer was instructing all the workers on the plan.

=>………………All the workers on the plan were instructed by the chief engineer…………………………………………………….

17. Somebody has taken some of my books away.

=>……………Some of my books have been taken away………………………………………….

18.. They will hold the meeting before May Day.

=>…………The meeting will be held before May Day……………………………………………………

19. The boys broke the window and took away some pictures.

=>……………The window was broken and some pictures were taken by the boys……………………………………………………….

20. People spend a lot of money on advertising every day.

->…………………A lot of money is spent on advertising every day…………………………………………………..