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`\color{#145277}{N}\color{#246483}{a}\color{#34768F} {e}\color{#44889B}{u}\color{#539AA7}{n}`

`@` IF `1` `:` If + S + Vs/es, S + will / can / `...` + V_bare 

`--------`

`1.` If you don't pay electricity bill today, your electricity will be cut off.

`2.` If you don't stop smoking, your cough may be worse.

`3.` If you do morning exercises regularly, your body will be fitter.

`4.` If you lock all the doors, no one can break into your house.

`5.` If you turn off the lights, you will not pay more money.

`6.` If you are careful, you may not have an accident.

`7.` If you don't phone your parents, you will have a trouble.

`8.` If you stay here, you will feel sick.

`9.` If you hurry up, you will not be late for school. 

2. If you don't stop smoking, your cough may be worse.

3. If you do morning exercises regularly, your body will be fitter.

4. If you lock all the doors, no one can break into your house.

5. If you turn off the lights, you will not pay more money.

6. If you are careful, you may not have an accident.

7. If you don't phone your parents, you will have a trouble.

8. If you stay here, you will feel sick.

9. If you hurry up, will not be late for school. 

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`-` Điều kiện loại 1 : If + S + V (s/es), S + will/can/may + V

`-` Diễn tả sự việc có thật ở hiện tại (tương lai)

`+` Unless + mệnh đề khẳng định $=$ If not : nếu không, trừ khi