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 bon means 'this isn't good'.
Ce n'est pas ce qu'elle a dit means "this is not what she said" in English.
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
Ce n'est même pas ma photo means 'this isn't even my photo'.
"Mais ce n'est pas le joyeux ..." means "but is is not the merry ..."
it means "it is not"
You can say "Ce n'est pas comme ça" in French to mean "It is not like that".