If I'm Hungry...
ZERO: If I (wake up) late, I (be) late for work.
If I wake up late, I'm late for work.
RULE: We use the zero conditional to talk about general truths or results that ______ happen if a condition is present.
always
ZERO: If Julie (not/wear) a hat, she (get) sunburnt.
If Julie doesn't wear a hat, she gets sunburnt