1. If you don't keep silent, you'll wake the baby up
2. If you stop talking, you will understand the lesson
3. If I knew the answer, I could tell you
4. If we had had a map, we wouldn't got lost
5. If she hadn't eaten four cream cakes, susan wouldn't have felt sick
6. If there had been any treatment, the patient would have died
7. he lost his job because of being late everyday
8. peter is fat because of eating so many chips
9. Bert got a bad cold because of smoking