She can't go on the field trip unless...
she returns the permission slip.
I don't like hot chocolate unless
it has marshmallows.
Don't raise your hand unless...
you know the answer.
We won't have recess unless (if not)
the rain stops.
You will fail the test unless...
you study for it.
You will have to eat school lunch unless (if not)
you pack a sack lunch.
I can't go to the park unless (if not)
I finish my homework.
The dog won't bite unless...
you try to pet him.
You can't drive a car unless...
you have a license.