Mixed practice : 1. Why don’t study hard ? If………………………………………………………………………….. 2. Keep silent or you’ll wake the baby up.If …………………………………………………………. 3. I don’t know the answer, so I can’t tell you. If…………………………………………………….. 4. We got lost because we didn’t have the map. If ……………………………………………………. 5. My friend was so late, so he missed the train. If …………………………………………………… 6. This car is too heavy for me to move. If…………………………………………………………… 7. Morning exercises make me feel healthy. If………………………………………………………. 8. The church bells keep me from sleeping. If………………………………………………………… 9. Without air, we would die. If………………………………………………………………….......... 10. I advise him to stop smoking. If……………………………………………………………………. 11. Be calm, or you’ll make a wrong decision. If……………………………………………………… 12. Without a visa, he couldn’t have come to that new country. If………………………………………………………………………………………………………. 13. Today isn’t Sunday, so the students don’t go swimming. If……………………………………………………………………………………………………….. 14. Because you don’t leave immediately, I call the policeman. If………………………………………………………………………………………………………… 15. I don’t know her number, so I don’t ring her up. If………………………………………………………………………………………………………… 16. Go right now or you will be late for the train. If………………………………………………………………………………………………………… 17. As she is often absent from class, she can’t keep pace with her classmates. If………………………………………………………………………………………………………… 18. I couldn’t write to Alice because I didn’t know her address. If………………………………………………………………………………………………………… 19. The heavy rain kept everybody from going outdoors. If………………………………………………………………………………………………………… 20. I didn’t watch TV last night because I was busy. If…………………………………………………………………………………………………………

1. Why don’t study hard ?

=> If i were you, I would study hard

2. Keep silent or you’ll wake the baby.

=> If you don't keep silent, you will wake the baby up

3. I don’t know the answer, so I can’t tell you.

=> If I knew the answer, I would tell you

4. We got lost because we didn’t have the map.

=> If we had had the map, we wouldn't have got lost

5. My friend was so late, so he missed the train.

=> If my friend hadn't been so late, he wouldn't have missed the train

6. This car is too heavy for me to move.

=> If I were you, I wouldn't move this heavy car

7. Morning exercises make me feel healthy.

=> If you do morning exercise, you will feel healthy

8. The church bells keep me from sleeping.

=> If the church didn't bell, I could sleep

9. Without air, we would die.

=> If we live without the air, we would died

10. I advise him to stop smoking.

=> If I were him, I would stop smoking

11. Be calm, or you’ll make a wrong decision.

=> If you are not calm, you'll make a wrong decision

12. Without a visa, he couldn’t have come to that new country.

=> If he hadn't had a visa, he couldn't have came to that new country

13. Today isn’t Sunday, so the students don’t go swimming.

=> If today were Sunday, the students would go swimming

14. Because you don’t leave immediately, I call the policeman.

=> If you left immediately, I won't call a policeman

15. I don’t know her number, so I don’t ring her up.

=> If l knew her number, I could ring her up

16. Go right now or you will be late for the train.

=> If you don't go right now, you'll be late for the train

17. As she is often absent from class, she can’t keep pace with her classmates.

=> If she weren't absent from class ,she could keep pace with her classmate

18. I couldn’t write to Alice because I didn’t know her address.

=> If I know her adress, I could write to Alice

19. The heavy rain kept everybody from going outdoors.

=> If it hadn't been rained heavily, everybody would have gone out

20. I didn’t watch TV last night because I was busy.

=> If I hadn't been busy last night, I would watched TV

Chúc bạn học tốt, cho mình xin ctlhn nha :D