100
are + not
What is aren't.
100
he + is
What is he's.
100
he + will
What is he'll.
100
they + are
What is they're.
100
let + us
What is let's.
200
does + not
What is doesn't.
200
she + is
What is she's.
200
she + will
What is she'll.
200
we + are
What is we're.
200
will + not
What is won't.
300
can + not
What is can't.
300
it + is
What is it's.
300
we + will
What is we'll.
300
you + are
What is you're.
300
must + not
What is mustn't.
400
would + not
What is wouldn't.
400
where + is
What is where's.
400
they + will
What is they'll.
400
had + not
What is hadn't.
500
could + not
What is couldn't.
500
there + is
What is there's.
500
you + will
What is you'll.
500
that + is
What is that's.