1. If you don't do your exercises, you willl fail the exam
2. If you ask the teacher, he will explain the lesson to you
3. If you don't go right now, you'll be late for the train
4. If you throw a stone into water, it will sink
5. If you want a chat, just give me a ring
6. If you take more exercise, you can get fit
7. If it rains, everyone can eat inside
8. If Mathew enters the race, he will probably win it
9. If you don't behave yourself, your parents will be very unhappy
10. If you don't do it carefully, you'll feel sorry afterwards