either

det.

pron.

1. （两者中的）任何一个
   one or the other of two; it does not matter which
   1. You can park on either side of the street.
      这条街两边都可停车。
   2. You can keep one of the photos. Either of them─whichever you like.
      你可以保留一张照片。两张里任选一张——拣你喜欢的。
   3. There are two types of qualification─either is acceptable.
      有两种资格证明——任何一种都可以接受。
2. （两者中的）每个，各方
   each of two
   1. The offices on either side were empty.
      两边的办公室都是空的。
   2. There's a door at either end of the corridor.
      走廊两端各有一道门。

adv.

1. （用于否定词组后）也
   used after negative phrases to state that a feeling or situation is similar to one already mentioned
   1. Pete can't go and I can't either.
      皮特不能去，我也不能。
   2. ‘I don't like it.’ ‘Me either.’ (= Neither do I.)
      “我不喜欢这个。”“我也不喜欢。”
2. （补充时说）而且
   used to add extra information to a statement
   1. I know a good Italian restaurant. It's not far from here, either.
      我知道一家很好的意大利餐馆，而且离这儿不远。
3. （对两事物的选择）要么…要么，不是…就是，或者…或者
   used to show a choice of two things
   1. Well, I think she's either Russian or Polish.
      嗯，我看她不是俄罗斯人就是波兰人。
   2. I'm going to buy either a camera or a DVD player with the money.
      我打算用这笔钱买一台照相机或者DVD机。
   3. Either he could not come or he did not want to.
      他要么是不能来要么就是不想来。

1. CONJ-COORD （表示在两者或多者中择其一）或者，要么
   You use either in front of the first of two or more alternatives, when you are stating the only possibilities or choices that there are. The other alternatives are introduced by 'or'.
   1. They gave money to the Conservative Party either personally or through their companies...
      他们要么以个人名义要么通过他们的公司捐钱给了保守党。
   2. Sightseeing is best done either by tour bus or by bicycles...
      最好是乘坐旅游巴士或骑自行车观光。
   3. The former President was demanding that he should be either put on trial or set free...
      前总统要求要么对他进行审判，要么将他释放。
   4. Either she goes or I go.
      要么她走，要么我走。
2. CONJ-COORD （用于否定句中）两者都（不），既（不）
   You use either in a negative statement in front of the first of two alternatives to indicate that the negative statement refers to both the alternatives.
   1. ...music that fails to be either funny or funky...
      既无趣又没有强烈节奏的音乐
   2. There had been no indication of either breathlessness or any loss of mental faculties right until his death.
      他去世前并未出现呼吸困难或意识不清的迹象。
3. PRON （两者之中）任意一个
   You can use either to refer to one of two things, people, or situations, when you want to say that they are both possible and it does not matter which one is chosen or considered.
   1. There were glasses of champagne and cigars, but not many of either were consumed...
      这里有香槟和雪茄，但两样东西都没怎么动。
   2. If either were killed, delicate negotiations would be seriously disrupted.
      二人中任意一个遇害，都会严重扰乱本已非常棘手的谈判。
   3. Either is also a quantifier.
      
   4. They are able to talk openly to one another whenever either of them feels hurt...
      他们俩无论谁感觉受到了伤害，都能够向对方坦言相告。
   5. Do either of you smoke or drink heavily?
      你们两人中有谁烟瘾或酒瘾很大吗？
   6. Either is also a determiner.
      
   7. I don't particularly agree with either group.
      双方我都不甚赞同。
4. PRON （用于否定句）两者都(不)
   You use either in a negative statement to refer to each of two things, people, or situations to indicate that the negative statement includes both of them.
   1. She warned me that I'd never marry or have children.—'I don't want either.'
      她告诫我千万不要结婚，也别要孩子。——“这两样我都不想要。”
   2. Either is also a quantifier.
      
   3. There are no simple answers to either of those questions.
      两个问题都不容易回答。
   4. Either is also a determiner.
      
   5. He sometimes couldn't remember either man's name.
      有时候，两个人的名字他一个都想不起来。
5. ADV （用于否定句）也（不），亦（不）
   You use either by itself in negative statements to indicate that there is a similarity or connection with a person or thing that you have just mentioned.
   1. 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。
   2. 'I'm afraid I've never been there.'—'Well, of course, I haven't myself either.'
      “恐怕我没去过那里。”——“嗯，那当然，我也没有去过。”
6. ADV （用于两个连续否定句的第二句之后，强调两种观点同样重要）而且，还
   When one negative statement follows another, you can use either at the end of the second one to indicate that you are adding an extra piece of information, and to emphasize that both are equally important.
   1. Don't agree, but don't argue either...
      别同意，但是也别争辩。
   2. I can't manage that by myself and I don't see why it should be expected of me either.
      我一个人没法做那事，我也不明白为什么得要我去做。
7. DET (两者中的)每个，各方
   You can use either to introduce a noun that refers to each of two things when you are talking about both of them.
   1. The basketball nets hung down from the ceiling at either end of the gymnasium...
      篮筐分别从体育馆两头的天花板上悬吊下来。
   2. I suddenly realized that I didn't have a single intelligent thing to say about either team.
      我突然意识到我对两队都没有一句称得上有见地的话可讲。

1. The government cannot afford to alienate either group.
   疏远两个团体中的任何一方都是政府承受不起的。
2. 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。
3. 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。
4. They gave money to the Conservative Party either personally or through their companies
   他们要么以个人名义要么通过他们的公司捐钱给了保守党。
5. Sightseeing is best done either by tour bus or by bicycles
   最好是乘坐旅游巴士或骑自行车观光。
6. The former President was demanding that he should be either put on trial or set free
   前总统要求要么对他进行审判，要么将他释放。
7. Either she goes or I go.
   要么她走，要么我走。
8. There had been no indication of either breathlessness or any loss of mental faculties right until his death.
   他去世前并未出现呼吸困难或意识不清的迹象。
9. There were glasses of champagne and cigars, but not many of either were consumed
   这里有香槟和雪茄，但两样东西都没怎么动。
10. If either were killed, delicate negotiations would be seriously disrupted.
    二人中任意一个遇害，都会严重扰乱本已非常棘手的谈判。
11. She warned me that I'd never marry or have children. —'I don't want either. '
    她告诫我千万不要结婚，也别要孩子。——“这两样我都不想要。”
12. 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。
13. 'I'm afraid I've never been there.' —'Well, of course, I haven't myself either. '
    “恐怕我没去过那里。”——“嗯，那当然，我也没有去过。”
14. Don't agree, but don't argue either
    别同意，但是也别争辩。
15. I can't manage that by myself and I don't see why it should be expected of me either.
    我一个人没法做那事，我也不明白为什么得要我去做。
16. The basketball nets hung down from the ceiling at either end of the gymnasium
    篮筐分别从体育馆两头的天花板上悬吊下来。
17. I suddenly realized that I didn't have a single intelligent thing to say about either team.
    我突然意识到我对两队都没有一句称得上有见地的话可讲。
18. 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。
19. 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。
20. Either he went through with this thing or he did not; it was all or nothing.
    他要么把这件事做完，要么就不做，只有这两种选择。
21. 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。
22. Either you can talk to him, or I will
    要么你跟他谈，要么我去。
23. Most single parents are either divorced or separated
    大多数单身父母要么离婚了要么分居了。
24. After the violent clashes of 1981 they either went underground or left the country.
    经历了1981年的激烈冲突之后，他们或转入地下，或离开了该国。
25. If you're not going, I'm not going either.
    你不去，我也不去。
26. You can apply either personally or in letter.
    你可以亲自接洽也可以写信。
27. You may take either of the two.
    你可以从两个中间挑任何一个。
28. It must be either this or that.
    非此即彼。
29. You shouldn't worry about the present either. There is no river that can't be crossed.
    你对目前的申请别犯愁，没有过不去的河嘛。
30. He must be either mad or drunk.
    他要么是疯了，要么是喝醉了。

  also either too【导航词义：也】

  also adv. 也

〔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。

  either adv. 也（不）

〔辨析〕

  too adv. 也，亦

〔辨析〕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。

adv

1. after a negative statement used as an intensive meaning something like `likewise' or `also'
   1. he isn't stupid, but he isn't exactly a genius either
   2. I don't know either
   3. if you don't order dessert I won't either