công thức: S1+ ĐT khuyết thiếu+be+Vp2+[by+S2]+O

1.Traffic rules must be obeyed strictly to reduce traffic accidents (by us).

2.Everything should be done well by me before the exam.

3. Sugar shouldn't be used too much in your diets.

4. Posters could be drawn for decorating streets by me.

1. We must obey traffic rules strictly to reduce traffic accidents.

=> Traffic rules must be obey strictly to reduce traffic accidents.

2. I should do everything well before the exam.

=> Everything should be done well before the exam 

3. You shouldn't use much sugar in your diets. 

=> Much sugar shouldn't be used in your diets

4. I could draw posters for decorating streets.

=> Posters could be drawn for decorating streets.

Have the Christmas been sent to your family?

Have the Christmas cards been sent (by you) to your family?

He could not helped by anyone

He could helped by no one

Hong biết có đúng hong 1 trong 2 câu thui

Chuyển từ câu chủ động sang bị động 

no one could help him

...........He couldn't helped.....................

no one không cần by

Phải cần by vì nếu ko có by thì nghĩa sẽ là "anh ấy ko được trợ giúp bất kỳ ai" nếu có by thì nghĩa là " anh ấy ko được trợ giúp bởi bất kỳ ai."

Bạn sai rùi nhưng mình vẫn k cho bạn í.

Chuyển câu chủ đông thành câu bị động:

1. Her husband didn't love her

she wasn't loved by her husband

2. No one could do anything to put the fire off

nothing could be done to put the fire off

3. He is going to present the athletes to the spectators

the athletes are going to be presented to the spectators

4. Our grandmother tells children's stories to us

children's stories are told to us by Our grandmother

5. Vietnamese women continue to wear the unique and fashionable"ao dai"

the unique and fashionable"ao dai" continue to be worn by Vietnamese women

6. A lot of money has been spent on advertising in recent years

they have spent A lot of money on advertising in recent years

Chuyển câu chủ đông thành câu bị động:

1. Her husband didn't love her

=> She wasn't loved by her husband.

2. No one could do anything to put the fire off

=> Anything couldn't be done to put the fire off.

3. He is going to present the athletes to the spectators

=> The athletes are going to be presented to the spectators.

4. Our grandmother tells children's stories to us

=> Children's stories are told to us by our grandmother.

5. Vietnamese women continue to wear the unique and fashionable"ao dai"

=> The unique and fashionable '' ao dai'' continues to be worn by Vietnamese women.

6. A lot of money has been spent on advertising in recent years

=> Advertising has been spent on a lot of money in recent years.

1. Soccer was played by them.

2. Lan was met last night.

3. Chinese can be spoken by Mai.

4. Your homework must be done by you

( câu 3 và 4 vì dùng ĐTKT ở câu chủ động nên chuyển sang bị động vẫn nên để ở ĐTKT)

Chuyển các câu sau sang câu bị động thì quá khứ đơn: 

1.They played soccer 

=> SOCCER WAS PLAYED

2.I met Lan last night.

=> Lan was met me last night

Chuyển câu chủ động sang câu bị động thì tương lai hoặc động từ khuyết thiếu:

1.Mai can speak Chinese.

=> Chinese can be spoken by Mai

2.You must do your homework.

=> Your homework must be done by You

1. Soccer was played by them

2. Lan was met by me last night

3. Chinese can be spoken by Mai.

4. Your homework must be done by you

Áp dụng công thức chuyển đổi câu bị động từ câu chủ động , học thuộc V_ed/p3 để trả lời dễ dàng nhé 

Passive voice with the tences : 
- No one could do anything to put the fire off
=> The fire could not be done anything to be put out

1. Yes, I have helped the community. On that day, on the way to school I saw a baby lost and I took that baby to the police station and luckily the baby found his mother, her mother was grateful and invited me. I went to eat ice cream

2. We can propaganda about protecting the environment clean, sweeping the school grounds, streets, ...

3. I will propagate and help the relatives, friends, ... cleaning the neighborhood, school, ... to help our environment clean.

4. I will propagate and help the relatives, friends, ... cleaning the neighborhood, school, ... to help our environment clean.

5. Yes, i did, I propagate and help the relatives, friends, ... cleaning the neighborhood, school, ... to help our environment clean.

a. Was a bread brought you by him ?

b. Is Tom's homework done ?

c. Are films on TV being watched by you ?

d. Were your parents visited by you?

e. Is a letter written to her by you ?