1) Een vorm van to be: She is smart. - She is not smart.
2) Have got/ has got: I have got a black car. - I have not got a black car.
3) Hulpwerkwoord: She can play the piano. - She cannot play the piano?
4) Geen van bovenstaande: dan gebruik je don't & doesn't
I have a black car. - I don't have a black car.
She likes him. - She doesn't like him.