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. |
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? |