helpppppppppppppppppp

chuyển sang bị động 

1. A dancing class was started last week.

- Bị động QKĐ: S + was/were + V3/ed + O

2. The accident was seen by Mr. Smith.

- Bị động QKĐ: S + was/were + V3/ed + (by O)

3. My briefcase has been taken.

- Bị động HTHT: S + have/has + been + V3/ed + O

4. Our written work was returned to us by the teacher.

- Bị động QKĐ: S + was/were + V3/ed + (by O)

5. The report has been finished by noon. 

- Bị động HTHT: S + have/has + been + V3/ed + O