N'est-ce pas means "isn't it" in English.
trés jolie n'est-ce pas? isn't it/she pretty?
"ce n'est pas un problème - au revoir" means "this is not a problem - goodbye" in French.
Ce n'est pas ce qu'elle a dit means "this is not what she said" in English.
Ce n'est pas bon means 'this isn't good'.
This is not what you think.
You can say "Ce n'est pas vrai" in French to mean "This is not true".
n'est-ce pas means isn't it in French.
these aren't
"Mais ce n'est pas le joyeux ..." means "but is is not the merry ..."
Ce n'est même pas ma photo means 'this isn't even my photo'.
it means "it is not"
You can say "Ce n'est pas comme ça" in French to mean "It is not like that".