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