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1. If you don't turn off all the lights, you will pay more money
2. If she doesn't wear warm clothes, she will have a cold
3. If you aren't careful, you may have an accident
4. If you don't phone your parents, you will have a trouble
5. If she doesn't whisper, everyone will know what she is saying
6. If you stay here, you will feel save
7. If you don't pay your electricity bill today, your electricity will be cut off
8. If you don't stop smoking, your cough may be worse

9. If we don't use less fossil fuels, they will be run out soon
10. If it doesn't stop raining today, we may be faced with a serious flood
11. If you do morning exercise regularly, your body will be fitter
12. If we don't renewable energy, we will have nothing for the future generations
13. If we don't reduce the use of non-renewable energy, the climate will change
14. If you lock all the doors, no one can break into your house
15. If we countinue hunting the polar bears, they will become extinct in near future