Đáp án:

`1.` Portuguese is spoken in Brazil.

`2.` This house was built by My grandfather in 1943.

`3.` The office has been cleaned by The cleaner.

`4.` She will be phoned by John.

`5.` The work should be done.

`6.` Mr Brown is loved.

`7.` The princess was eaten by The wolf.

`8.` All the milk have been drunk.

`9.` The computer will be repaired by A workman.

`10.` These days must be worn.

`*` Cấu trúc bị động:

`+` Thì HTHT: S  + have/has + been + Ved/V3 + (by  o)...

`+` Thì QKĐ: S + was/were + Ved/V3 + (by  o)...

`+` Thì HTĐ: S + am/is/are + Ved/V3 + (by   o)...

`+` Thì TLĐ: S + will + be + Ved/V3 + (by   o)...

1. People speak Portuguese in Brazil.

=> Portuguese is spoken in Brazil.

2. My grandfather built this house in 1989.

=> This house was built by my grandfather in 1943.

3. The cleaner has cleaned the office.

=> The office has been cleaned by the cleaner.

4. John will phone her later.

=> She will be phoned by John later.

5. Somebody should do the work.

=>The work should be done by somebody.

6. Everybody loves Mr Brown.

=>Mr Brown is loved by everybody.

7. The wolf ate the princess.

=>The princess was eaten by the wolf.

8. Somebody has drunk all the milk!

=> The milk has been drunk.

9. A workman will repair the computer tomorrow.

=> The computer will be repaired tomorrow by a workman.

10. People must wear masks these days. 

=> Masks must be worn these days.