1. If you don't water the plants, they will shrivel.
2. When you finish your homework, you should breath some fresh air outdoor.
3. If they eat to much, they will be fat.
4. If you are not careful, you may cause an accident.
5. If you heat water, it will vaporate.
6. If you mix black and white paint, you will get gray color.
7. If he is late for school, he will receive a bad mark.
8. Unless you study harder, you will have got problems with understanding on lessons.