1.The safe is usually looked carefully ( by us)

2. The safe is kept in the bedroom on the second floor( by us)

3.Everything in it were stolen yesterday by the thieves.

4. The police was told about it (by us.)

5. Everything in the house were checked by the police.

6. Everybody in the house were questioned by the police.

7. The house was surrounded by the police.

8. The police did not think that the thieves were caught ( by them).

9. A lot of flowers are grown in Da Lat( by them)

10. Many kinds of goods were bought in pleiku city by my mother.

( Những câu này bạn cứ dựa vào công thức bị động ở quá khứ và hiên tại là có thể chuyển đổi được. Thường có 3 bước làm: 

- Xác định chủ, động, túc.

- Xác định thì.

- Chuyển đổi theo công thức.

Những túc từ sau " by" không xác định thì bạn có thể bỏ cũng được. Chúc bạn học tốt!)

1. The safe is usually locked carefully

2. The safe is kept in the bedroom on the second floor

3. Everything in it was stolen by the thieves yesterday

4. The police was told about it

5. Everything was checked in the house by the police

6. Everybody was questioned in the house by the police

7. The house was surrounded by the police

8. They weren't thought to catch the thieves by the police

9. A lot of flowers are grown in Dalat.

10.Many kinds of goods was bought in pleiku City by my mother