1. Their teacher will be sad if they don't pass the exam 

2. If you do not say sorry, they will not forgive you

3. You can't buy this watch if you don't have enough money

4. If he wants to pass the exam, she should study harder

5. If you want to stay healthy, you should not continue smoking 

6. Will you stay at home if it rains tomorrow?

7. We won't invite her again if she doesn't come

8. You should visit the local museum if you have time

9. I will call you a ride home if it rains tonight

10. The plants may not need fertilizer if the soil is rich

*Câu điều kiện loại 1: If + S + V(s,es), S + will + V(inf)

- Có thể thay will bằng các modal verb

$1$. Their teacher will sad if they don't pass the exam.

$2$. If you don't say sorry, they won't forgive you.

$3$. You cannot buy this watch if you don't have enough money.

$4$. If he wants to pass the exam, he should study harder.

$5$. If you want to be healthy, you should not continue smoking.

$6$. Will you stay at home if it rains tomorrow?

$7$. We will not invite she again if she does not come.

$8$. You should visit the local museum if you have time.

$9$. I will call you a ride home if it rains tonight.

$10$. The plants may not need fertilizer if the soil is rich.

Cấu trúc câu điều kiện loại I:

If + S + V(hiện tại đơn), S + can/ may/ should/ will ... + Vnd.