Examples of using "упадёшь" in a sentence and their english translations:
You’ll fall!
You'll fall down.
You'll fall down.
Take care lest you should fall.
A single step, and you will fall over the cliff.
Hold on tight, otherwise you will fall off.
You look like you're going to pass out or something.
Watch your step, or you will slip and fall.
If you were to fall from that bridge, it would be almost impossible to rescue you.