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1. If you don't keep silent, you'll make the baby up.
2. If you don't stop talking, you won't understand the lesson.
3. If I knew her number, I would ring her up.
4. If I knew the answer, I could tell you.
5. If we had had a map, we wouldn't have got lost.
6. If she hadn't eaten four cream cakes, Susan wouldn't have felt sick.
7. If there hadn't been this treatment, the patient would have died.
8. If he hadn't been late every day, he wouldn't have lost his job.
9. If Peter didn't eat so many chips, he wouldn't be fat.
10. If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough.

exercise 2:

1. If you don't keep silent, you'll make the baby up.

2. If you don't stop talking, you won't understand the lesson.

3. If I knew her number, I could ring her up.

4.  If I knew the answer, I could tell you.

5. If we had a map, we wouldn't have got  lost.

6. If she hadn't eaten four cream cakes, Susan wouldn't have felt sick.

7. If there hadn't been this treatment, the patient would have died.

8. If he hadn't been late everyday, he wouldn't have lost his job.

9. If Peter didn't eat so many chips, he wouldn't be fat.

10. If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough.

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