1. Do they teach English here?
→ Is English taught here?
2. Will you invite her to your wedding party?
→ Will she be invited to your wedding party?
3. Did the teacher give some exercises?
→ Were some exercises given by the teacher?
4. Is he going to write a poem?
→ Is a poem going to be written by him?
5. Have they changed the window of the laboratory?
→ Have the window of the laboratory been changed?
6. Is Tom making big cakes for the party?
→ Is big cakes for the party being made by Tom?
7. Must we finish the test before ten?
→ Must the test be finished before ten?
8. Are the police making inquires about the thief?
→ Are inquires about the thief being made by the police?