A （两者）都不的not one nor the other of two

　neither　常用在不带冠词的单数名词之前，谓语动词要用单数形式。

　I went to see Jack and Bill yesterday, but neither one was at home.　昨天我去看杰克和比尔，可是两个人都不在家。
　Neither man spoke.　两个人都不说话。
　Neither hand is clean.　两只手都不干净。
　On neither side of the street are there any trees.　街道两旁都没有什么树木。
　In neither case can we agree.　无论哪一种情况，我们都不能同意。

　两者都不　both not

　I have two hats but neither fits me properly.　我有两顶帽子，但对我都不适合我。
　Neither of my parents is a teacher.　我父母都不是教师。
　Neither of you believes one word that you are saying.　你们连自己说的一句话也不相信。
　Which of the two films did you like? —Neither!
　They were both dull.　这两部电影你喜欢哪一部?——都不喜欢！两部电影都枯燥无味。

 ♣ neither, both, either
　这三个词都表示“两者…”。neither表示“两者都不…”，常与单数谓语动词搭配；both表示“两者都…”，常与复数谓语动词搭配；either表示“两者之一”，常与单数谓语动词搭配。
 ♣ neither, none
　neither　用于否定两个人或物；none用于否定三个或三个以上的人或物。

　也不　not either

　You didn't see him, and neither did I.　你没有看见他，我也没有。
　If you do not go, neither shall I.　你不去我也不去。
　Just as I haven't good eyes, neither have my children.　就好像我视力不好，我的孩子们视力都不好。
　The first one was not good, neither was the second one.　第一个不好，第二个也不好。

　不　not

　Neither Jack nor I have seen this film.　杰克和我都没有看过这部电影。
　Neither volleyball nor basketball is a hundred years old.　排球和篮球都不到一百年的历史。
　Neither you nor he is right.　你和他都不对。
　Neither the teacher nor his students know how to work out the problem.　老师和他的学生们都解不出那道题。
　I left my watch on the table, but when I returned I could find neither hide nor hair.　我把手表忘在桌上了；可当我回来找时，什么都没有了。
　This essay hardly makes any sense, it's neither rhyme nor reason.　这篇文章写得不伦不类，简直不知所云。

　neither...nor...　后面的谓语动词也有与nor后的词不一致的情况，这多出现在非正式文体中。

　［词源］古英语nawther（两方中哪一方都不是）