9. If the young girl doesn't stop smoking, she won't be healthy

10. If people didn't know you, they wouldn't give you some precious information

III

1. If he didn't have to study for his exam, he could go out.

2. If she weren't lazy, she could pass the exam.

3. If he pays me tonight, I will have enough money to buy a car.

4. If he didn't smoke too much, he could get rid of his cough

5. If she weren't shy, she would enjoy the party

6. If you don't tell me the whole truth, I won't help you

7. If he took some exercises, he wouldn't be so unhealthy

8. If I had the right change, we could get the ticket

9. If you don't study  hard, you won't pass the exam

10. If you are impatient, you will make mistakes

11. If I had  eaten lunch, I wouldn't feel hungry now

12. But for the rain, we wouldn't have a better crop

13. If I were you, I wouldn't buy it

14. Unless they invite me, I won't come

15. If he had revised all his lessons, he wouldn't have failed the exam