If + Present simple + Will to talk about real possibilities.

We can use other conditional tools instead of "if" like unless (if not), as soon as and when.

- If he comes today, I will tell him.

- Unless it rains, I will visit you.

- I will do it as soon as I get home.

- When I have some sleep I will help you with the boxes.

We can also use other modal verbs instead of "will" like won't (will not), can, should and must.

- If it snows, people won't go out.

- If she stays here, she should show some respect.

- If you go to France, you must have your passport.