We must learn to live together as brothers, or we will perish together as fools.
Ami frowned in a very un-amused way as I brushed her off with a laugh.
Shut up, or I'll kick you out.
Hold your tongue, or you'll be killed.
Hold your tongue, or you'll be punished.
Read the newspaper every day, or you will fall behind the times.
Keep down, or you'll be shot.
They'd better beef up their report or it won't be accepted.
They lost their way; otherwise, they would have arrived long ago.
He left early; otherwise he could not have caught the train.
He did his best; otherwise he would not have won the first prize.
He did what he had been told; otherwise he would have been scolded.
He studied hard; otherwise he would have failed again.
Put the meat in the refrigerator, or it will rot.
You've got to be careful or else you'll miss it again.
Listen carefully, or you won't follow me.
Run fast, or you will be late for school.
Run fast, otherwise you will miss the bus.
Watch your step, or else you will trip on the baggage.
Watch your step, or you will slip and fall.