6. If I hadn't been tired, I could have gone to work yesterday

Câu ĐK loại 3, form: If + S + QK hoàn thành, S + would/could + have + part participate

7. If had had an umbrella, I wouldn't have got wet

Câu ĐK loại 3

8. The food is being cooked by Mrs. Green ịn the kitchen

Câu bị động, form: S + is/am/are + being + part participate + (by O)

9, A birthday party is being prepared for him by his family today.

Câu bị động

10. A new hotel is being built near the park 

Câu bị động

11. A letter was being written by Mary at 3p.m yesterday

Câu bị động, form: S + was/were + being + part participate + (by O).