If 1:

If + S + am/is/are , S + will/can/shall + V1

If + S + V1/s/es , S + will/can/shall + V1

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Unless: trừ khi = If ... not 

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7. If you are careless, you will break the vase.

8. If you litter the place around you, it will be a junk yard.

9. If Nam has to work hard, he will pass the exam.

10. If we buy recycled products, we can save the environment.

11. Unless you keep quiet, I'll scream.

12. If you don't study hard, you will fail the final exam.

`color{orange}{~LeAiFuRuiHuiBao~}`