Bonsoir
1- I'm not in Nice. (I am not)
Où
He's not in Nice.
2- Mary and my sisters aren't good friends. (are no)
3- My grandparents aren't on holidays in Miami. (are not)
4- My name isn't John and I'm not from Cardiff. (is not/ am not)
Pour 'is not", tu peux faire les 2 : he isn't ou he's not. Tout dépend de l'intonation de la phrase
Bonne soirée
