how to use the word "either and neither"?

either 同 too 係好相似的
too用係肯定動詞之後
A: Im happy
B: Im happy too

either用係否定動詞之後
A: Im not happy
B: Im not happy either

A:I cant cook
B:I cant either ( not I cant too)

Neither 同either亦都好似
A: I havent got a key
B: Neither have I.=I havent either.

A:Ann cant cook
B:Neither can Tom = Tom cant either

A: I wont be here tomorrow.
B: Neither will i

Nor = Neither
A: Im not married.
B: Nor am I. or Neither am I.

EITHER
One or the other of two (兩者之中的其中一個)
e.g. It's either a boy or a girl (不是男仔就是女仔)
e.g. Either say u r sorry or (else) get out (你一係就說對不起﹐一係就出去)
e.g. There r 2 ways 2 the post office. You may take either one.
(去郵局有些兩條路﹐ 你可以就任何一條)

NEITHER
Not one and not the other of two (兩者都不的﹐皆不)
e.g. Neither is a good man (兩者都不是好男人)
e.g. Will u have tea or coffee? Neither, thanks (喝茶或o加啡﹖ 兩樣都不要了﹐謝謝)
e.g. Neither computer is good. (兩部電腦都不好)

either 之後會加 or
如 She is coming either today or tomorrow--她不是今天就是明天來。(用於兩者選其一)...

而neither 之後會加 nor
如 We had neither money nor food--我們既沒有錢,也沒有食物, (用於兩者都不是)

hope i can help you