6. I returned a book to the library.

-> The library was returned a book by me.

7. The mechanic is repairing Judy’s car.

-> Judy's car is being repaired by the mechanic.

8. They were cleaning the floor when we came.

-> The floor was cleaned by them when we came.

9. Someone might have sent the letter to the wrong address.

-> The letter might have been sent to the wrong address.

10. The pollution in the city was affecting people’s breathing.

-> People's breathing was being affected by the pollution in the city.

6. A book was returned by me to the library.

7. Judy's car is being repaired by the mechanic.

8. The floor was being cleaned when we came.

9. The letter might have been sent to the wrong address.

10. People's breathing was being affected by the pollution in this city.

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Cấu trúc bị động :

QKĐ: S + was/were + Vp2

QKTD: S + was/were + being + Vp2