I am=I'm                          I am not=I'm not
You are =You're              You are not=You're not
We are=We're                 We are not=We're not
They are=They're             They are not=They're not
He is=He's                       He is not=He's not
She is=She's                     She is not=She's not
It is=It's                            It is not=It's not