`4.` If you do it carefully, you won't feel sorry afterwards.

`5.` If you ask him first, he will offer to help.

`6.` Unless you are calm, you won't make a wrong decision.

`7.` If you are careful, you won't cut yourself with that knife.

`8.` If you don't keep silent, you will wake the baby up.

`9.` If you go right now, you won't be late for the rain.

`10.` If you stop talking, you will understand the lesson.

`11.` If you are calm, you won't make a wrong decision.

Câu điều kiện loại `1`: If S + V(hiện tại), S + will + V_nguyên thể.

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