1. - I was given a new bike by my father last month.

    - A new bike was given to me by my father last month.

2. The windows are being cleaned by us now.

3. I am often taken to school by my sister.

4. English has been studied by us.

5. The fans had been turned off before they left.

6. This cake was being made by us when the power turned off.

7. You might be bitten by the dog.

8. The guitar can be played very well by Huy.

*Giải thích: Sử dụng cấu trúc câu bị động

1. S + Ved + O => S + was/were + P2 + by O

2. S + am/is/are + Ving + O => S + am/is/are + being + P2 + by O

3. S + V + O => S + am/is/are + P2 + by O

4. S + have/has + P2 + O => S + have/has + been + P2 + by O

5. S + had + P2 + O => S + had + been + P2 + by O

6. S + was/were + Ving + O => S + was/were + being + P2 + by O

7. S + might + V + O => S + might + be + P2 + O

8. S + can + V + O => S + Can + be + P2 + O

Study well!