either
单词辨析：
用于肯定句中，通常置于动词前，与 be 动词、助动词连用时则置于其后。
She also went away.
她也离开了。
He was also wrong.
他也错了。
〔辨析、例证〕
作为 too 的否定形式，常用于否定句中，且必须放在句末。试比较：
He can sing and dance, too.
他又会唱歌又会跳舞。
He can't sing, or dance either.
他不会唱歌，也不会跳舞。
I like the film, and she likes it, too.
我喜欢这部电影，她也喜欢。
I don't like the film, and she doesn't, either.
我不喜欢这部电影，她也不喜欢。
通常用于肯定句中，置于句末，在正式用法中 too 之前常用逗号隔开。
I'm going, too.
我也去。
These people came from all over Europe and America, too.
这些人来自欧洲各地，也有来自美国的。
It's a more beautiful dress and it's cheaper, too.
这条连衣裙更漂亮，也更便宜。
相关例句：
You are either a total genius or else you must be absolutely raving mad
你要么是个不折不扣的天才，要么就是完全疯了。
I am keeping my options open. I have not made a decision on either matter.
我保留选择权，这两件事我都还没有作出决定。
He did not even say anything to her, and she did not speak to him either
他甚至一句话也没跟她说，她也没跟他说话。
My digestion ain't so hot these days, either.
我的消化系统这几天也不怎么对劲儿。
She had met both sons and did not care for either.
两个儿子她都见了，一个都不喜欢。
You are either very young or an incurable optimist.
你要么非常年轻，要么是个不可救药的乐天派。