ne me quitte pas means 'don't leave me' in French.
The word for not is ne pas in French. It combines with is as n'est pas.Sometimes the word pas is enough, a type of verbal shortcut.
That would be: "ne peuvent pas"
Je ne peux pas - il m'est impossible
"Don't look elsewhere, this is here"
It means "He does not speak French as it"
"Tu ne parles pas français" means "You do not speak French" in French.
In French, you would say "Je ne comprends pas" to mean "I do not understand."
"je ne suis pas" means "I am not.." in French.
You can say "Ça ne me surprend pas" in French to mean "It does not surprise me."
You can say "Je ne t'aime pas" in French to mean 'I don't love you'.
You can say "Je ne suis pas français" in French to mean "I'm not French."
"not to do it"
You can say "Je ne pense pas" in French to mean "I don't think so."
You can say "Je ne porte pas" in French to mean "I don't wear."
You can say "Je ne parle pas français" in French to mean "I do not speak French."
Je ne sais pas means 'I don't know'.