conditional

Zero Conditional

facts, real

If + present= present

If I heat the water, it boils.

If I heat ice, it melts

First Conditional

possible If + present = will

If you behave well, I'll give you a sweet.

If you are free tomorrow, we'll go to the beach.

Second Conditional

imaginary

If + past = would

If I won the lottery, I would buy a big house.

If I travelled to the moon, I would see the earth.

Third Conditional

Regrets

If + past perfect= would have+past participle

If I had known she was sick, I would have visited her.

If I had worked harder, I wouldn't have lost my job.

If I had eaten less, I wouldn't have practiced a lot of sports