1. If you boil iced water, it melts into water  

2. If I have free time, I usually do some English videos for my dear students

3. If my headache goes away, we will play soccer

4. If she has enough time, she usually walks to school

5. If I had one million dollars, I would buy that car

6. If you try harder, you will get this job

7. If I were you, I wouldn't let her go

8. If he hadn't been mad, she could have told him the truth

9. If you meet her sooner, you will like her

10. If I hadn't absented yesterday, I could have met him

11. If I hadn't failed the last test, I would have studied at a university

12. If he hadn't lost, he would have arrived on time

Đây là công thức các câu điều kiện trên :

Câu ĐK loại 0: If + S + V (hiện tại), S + V (hiện tại)

Câu ĐK loại 1: If + S + V (s/es) , S + will / can/ may + V1 

Câu ĐK loại 2: If + S + were/ V-ed, S + would / could / should + V1

Câu ĐK loại 3: lf +S + had + Vpp, S + would / could / should + have + Vpp