the dog has not eaten
pas de chien means 'no dog' in French.
n'est-ce pas means isn't it in French.
oui j'ai un chien = yes, I have a dog je n'ai pas d'animal = I have no pet
je n'ai pas de chien
Mais ce n'est pas un chien
I suppose you mean n'est-ce pas ? which means isn't it ?
"n'est pas" means "is not" in English.
i don't like nuts= je n'aime pas les noix
N'est pas! in French means "Is not!" in English.
Pourquoi pas means 'why not?' in English.
I don't know anything about a dog (it's not correct French)
"Tu sais pas" means "You do not know" in English.