Dưới đây là câu chuyển sang dạng bị động:

1. Our homework has already been done by us.
2. A cake can be made by her.
3. His birthday is going to be celebrated by them.
4. English is spoken by people in the world.
5. New lessons should be prepared by students.
6. Lunch was cooked by my father today.
7. English is being learned by us now.
8. An English song was being sung by someone at 8 p.m. last night.