hello
"Not worth a red cent" is an English equivalent of the French phrase pas en valeur un cent rouge. The pronunciation of the words -- which translate literally as "not in usefulness (value, worth)" a red cent" -- will be "pa-zaw va-luhr eh saw roozh" in French.
"n'est pas" means "is not" in English.
N'est pas! in French means "Is not!" in English.
Pourquoi pas means 'why not?' in English.
" ... n'est pas heureuse " means "... isn't happy" in English. "ne pas heureuse" means "not happy", but is a fragment.
"Tu sais pas" means "You do not know" in English.
In English, pas de tout means "not at all"
N'est-ce pas means "isn't it" in English.
pas marrant means 'not funny'
[He/she/it] can't is an English equivalent of 'peut pas'. The verb 'peut' means '[he/she/it] can or is able to'. The adverb 'pas' means 'not'. Together, they're pronounced 'puh pah'.
"It means 'you do not live with them' in English."
It means "not that".