1. Do they teach English here ?

⇒ Is English taught here? 

2. Have they changed the window of the laboratory

⇒ Has the window of the laboratory been changed? 

3. Will the buses bring the children home ?

⇒ Will the children be brought home by the buses? 

4. How cant they open this safe ?

⇒ How can this safe be opened? 

5. The police advise driver to use an alternative rout

⇒ Driver is advised to use an alternative route by the police?

6. I knew that they had told him of the meeting

⇒ I knew that he had been told of the meeting. 

# Phan Anh Duy

1. Is English taught here? (S + is/am/are + Vpp + (by O))

2. Has the window of the laboratory been changed? (S + have/has + been + Vpp + (by O))

3. Will the children be brought home by the buses? (S + will + be + Vpp + (by O))

4. How can this safe be opened? (S + can/may... + be + Vpp + (by O))

5. Driver is advised to use an alternative route by the police?

6. I knew that he had been told of the meeting. (S + hads + been + Vpp + (by O))