If loại 3: diễn tả sự việc không có thật ở quá khứ

Công thức: If +S+ had+PP, S+would/could + PP

1. If i hadn't gone out last night, i wouldn't have missed my favourite program.

2.  She could have answered the phone if she had had free time

3. If they had gone to bed early, they could have got up early

4. He wouldn't have been punished if he had admited his mistake 

5. If the weather had been fine, we could have gone out yesterday

6. We could have helped you if you had told your difficulty

7. If it hadn't rained, I would have gone to school

8. An would have bought a television if she had been a lot of money

9. I would have gone to school on time if I had got up early

10. if i had work hard, I could have been promoted.