Rewrite the following sentences into the passive voice

1. A dancing class was started last week

=> Bị động ở quá khứ đơn: S+ was/ were+ Ved/ V3+ (by+O)

2. The accident was seen by Mr. Smith

=> Bị động ở quá khứ đơn: S+ was/ were+ Ved/ V3+ (by+O)

3. My briefcase has been taken

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

=> Bị động ở quá khứ đơn: S+ was/ were+ Ved/ V3+ (by+O)

5. The report has been finished by noon

=> Bị động ở hiện tại hoàn thành; S+ has/ have+ been+ Ved/ V3+ (by+O)

6. The little boy was bitten by the mad dog

=> Bị động ở quá khứ đơn: S+ was/ were+ Ved/ V3+ (by+O)

7. Five suspects have been arrested by the police

=> Bị động ở hiện tại hoàn thành; S+ has/ have+ been+ Ved/ V3+ (by+O)

8. He was ordered to take a long rest by the doctor

=> Bị động ở quá khứ đơn: S+ was/ were+ Ved/ V3+ (by+O)