If I'm Hungry...
FIRST: If I (go) out tonight, I (go) to the cinema.
If I go out tonight, I will go to the cinema.
RULE: The first conditional is used to talk about things that _____ happen in the future if a condition is present.
might
FIRST: If you (get) back late, I (be) angry.
If you get back late, I'll be angry.