1. If he were not lazy, his father wouldn't punish him.
2. I'd come if I didn't have to help my dad.
3. If Mr. Leon drove carefully, he wouldn't cause accidents.
4. If you keep talking, you will wake the children up.
5. If Mary had a map, she would not get lost.
6. If June ate fewer chips, he would not be fat.
7. If you do exercise, you will be healthy.
8. If he studied his lessons very carefully, he would get good marks now.
9. If you don't hurry up, you will be late for school.
10. If I knew English, I would apply for that job.