chuyển sang bị động 12. When is he going to repair the engine of the car? 13. You have to do this work at once. 14. They may use this room for the class. 15. They are going to rebuild our kitchen next week.

12. When is he going to repair the engine of the car?

⇒ When is the engine of the car going to be repaired?

'am/is/are + going to + V → bị động: am/is/are going to + be + V3/ed'

13. You have to do this work at once.

⇒ This work has to be done at once.

'Công thức bị động: to be + V3/V-ed'

14. They may use this room for the class.

⇒ This room may be used for the class.

'may/can/... (modal verbs) + be + V3/ed'

15. They are going to rebuild our kitchen next week.

⇒ Our kitchen is going to be rebuilt next week.