1. If I buy a new hat, I will give it to you
2. If today were sunday, the pupils could go swimming
3. If he had been here, he would have had a lot of fun
4. If my brother has enough money, he will buy a bicycle
5. If he had had enough time, he would have read this novel
6. If she had not missed the bus, she wouldn't have been late
7. If Peter studies hard, he could have good marks
8. If my sister didn't have a terrible headache, she would not be absent from her class
9. If Windy had came, we would not have cancelled this the meeting