Choose the right word combinations to complete the sentences.

Choose the correct option.

[Your mother has cooked|Has your mother cooked|Have you mother cooked|Your mother have cooked] dinner?

We [have bought|have buy|has bought|has buy] a new car recently.

John [have known|have know|has known|has know] Mike since they were teenagers.

They [not have seen|have not seen|has not seen|not has seen] a ghost.