If I see her, I will tell her.

There are several structures in English that are called conditionals.

"Condition" means "situation or circumstance". If a particular condition is true, then a particular result happens:

There are three basic conditionals that we use very often. There are some more conditionals that we do not use so often.

In this lesson, we will look at the three basic conditionals as well as the so-called zero conditional. We'll finish with a summary and then a quiz to check your understanding:

Structure of conditional sentences

First conditional

Second conditional

Third conditional

Zero conditional

Conditionals summary

Conditionals quiz

People sometimes call conditionals "if structures" or "if sentences" because there is usually (but not always) the word if in a conditional sentence.