What is the contraction of are not ?
aren't
What is the contraction of cannot ?
can't
What is the contraction of was not ?
wasn't
What is the contraction of were not ?
weren't
What is the contraction of have not?
haven't
What is the contraction of do not?
don't
What is the contraction of is not?
isn't
What is the contraction of could not ?
couldn't
What is the contraction of has not?
hasn't