1.too adv.
也,还(常用于肯定句,有时也用于疑问句,但不能用于否定句。常见于句末,而且too前常有逗号;如果不在句末,too前后都应当有逗号):
I like lamb, too.
我也喜欢小羊肉。
Can I come, too?
我也来,行吗?
I, too, have been to Shanghai.
我也到过上海。
2.either adv.
也,而且(一般用于否定句,位于句末,前面通常有逗号):
He doesn't like the house, and I don't like it, either.
他不喜欢这所房子,我也不喜欢。
If you do not go, I shall not go, either.
如果你不去,那么我也不去。
I haven't seen the film and my sister hasn't either.
我没有看过那部电影,我妹妹也没看过。