Neither ... Nor
Neither... nor is equivalent to not... either... or:
Neither Paul nor John will be there. --> Paul won't be there and John won't be there.
He speaks neither French nor Germany.
We brought neither pens nor pencils.
I will neither help you nor do my homework.
Neither can also be followed by one of + group of two:
Neither of them is ready.
Neither one of them is ready.
Neither of us should know.
Neither one of us should know.
Neither is used like not... either:
I don't speak french.
Neither do I (informal: me neither)
He isn't ready to go.
Neither are we.
Either means "one", neither means "none", and not either equals neither. Or goes with either and nor goes with neither.
Next post, some exercises.