First Conditional.

What is it?

The first conditional talks about the future.

We are thinking about a particular condition or situation in the future, and the result of this condition. There is a real possibility that this condition will happen. For example, it is morning. You are at home. You plan to play tennis this afternoon. But there are some clouds in the sky. Imagine that it rains. What will you do?

IF	condition	result
	present simple	WILL + base verb
If	it rains	I will stay at home.

The important thing about the first conditional is that there is a real possibility that the condition will happen.

To practice and deep dive into the first conditional, play this game provided by ENGames. It's a fun way to get to know the tense. 

Here also a couple more examples, just in case!

IF	condition	result
	present simple	WILL + base verb
If	I see Mary	I will tell her.
If	Tara is free tomorrow	he will invite her.
If	they do not pass their exam	their teacher will be sad.
If	it rains tomorrow	will you stay at home?
If	it rains tomorrow	what will you do?