We can not meet you later.
We can't meet you later.
He is not my friend.
He isn't my friend.
These are not my cats.
These aren't my cats.
She can not play the piano well.
She can't play the piano well.
That is not my school.
That isn't my school.
Those are not my pencils.
Those aren't my pencils.
There is not a science room.
There isn't a science room.
There are not any books.
There aren't any books.
They can not go by plane.
They can't go by plane.
She is not tall.
She isn't tall.
I can not understand him easily.
I can't understand him easily.