need

verb

1. 需要；必需
   to require sth/sb because they are essential or very important, not just because you would like to have them
   1. Do you need any help?
      你需要帮忙吗？
   2. It's here if you need it.
      你要的话就拿去吧。
   3. Don't go─I might need you.
      别走——我可能要你帮忙。
   4. They badly needed a change.
      他们迫切需要一次变革。
   5. Food aid is urgently needed.
      迫切需要食物援助。
   6. What do you need your own computer for? You can use ours.
      你干吗还要自己买电脑？你可以用我们的。
   7. I don't need your comments, thank you.
      谢谢，我不需要你来评头论足。
   8. I need to get some sleep.
      我需要睡会儿觉。
   9. He needs to win this game to stay in the match.
      他得赢下这场比赛以免被淘汰出局。
   10. You don't need to leave yet, do you?
       你不必现在就走吧？
   11. This shirt needs washing.
       这件衬衣该洗了。
   12. This shirt needs to be washed.
       这件衬衣该洗了。
2. （表示应该或不得不做）有必要
   used to show what you should or have to do
   1. All you need to do is complete this form.
      你要做的就是填好这个表格。
   2. I didn't need to go to the bank after all─Mary lent me the money.
      我最终还是不必去银行了——玛丽借我钱了。

modal verb

1. （表示没有必要或询问是否有必要）需要
   used to state that sth is/was not necessary or that only very little is/was necessary; used to ask if sth is/was necessary
   1. You needn't finish that work today.
      你不必今天做完这项工作。
   2. You needn't have hurried (= it was not necessary for you to hurry, but you did) .
      你当时不必这么匆忙。
   3. I need hardly tell you (= you must already know) that the work is dangerous.
      这工作很危险，这就不用我说了。
   4. If she wants anything, she need only ask.
      她想要什么东西，只要开一下口就行了。
   5. All you need bring are sheets.
      你需要带的就是床单。
   6. Need you have paid so much?
      你用得着花那么多钱吗？

noun

1. 需要；必须
   a situation when sth is necessary or must be done
   1. to satisfy/meet/identify a need
      满足 / 迎合 / 看出某种需要
   2. There is an urgent need for qualified teachers.
      迫切需要合格教师。
   3. There is no need for you to get up early tomorrow.
      你明天不必早起。
   4. I had no need to open the letter─I knew what it would say.
      我没必要拆开那封信——我知道里面会说些什么。
   5. The house is in need of a thorough clean.
      这房子需要来个大扫除。
   6. We will contact you again if the need arises.
      如果有必要，我们会再次和你联系。
   7. There's no need to cry (= stop crying) .
      不要哭了。
2. 特别需要；迫切要求
   a strong feeling that you want sb/sth or must have sth
   1. to fulfil an emotional need
      满足感情的迫切需要
   2. She felt the need to talk to someone.
      她特别想和人聊聊。
   3. I'm in need of some fresh air.
      我很想呼吸一点新鲜空气。
   4. She had no more need of me.
      她再也不需要我了。
3. 需要的事物；欲望
   the things that sb requires in order to live in a comfortable way or achieve what they want
   1. financial needs
      经济上的需要
   2. a programme to suit your individual needs
      满足你个人需要的项目
   3. to meet children's special educational needs
      满足儿童特殊教育的需要
4. （食物、钱或生活来源的）短缺，缺乏
   the state of not having enough food, money or support
   1. The charity aims to provide assistance to people in need .
      这个慈善机构的宗旨是向贫困者提供帮助。
   2. He helped me in my hour of need .
      在我生活困难的时候他帮助了我。

Need sometimes behaves like an ordinary verb, for example 'She needs to know' and 'She doesn't need to know' and sometimes like a modal, for example 'She need know', 'She needn't know', or, in more formal English, 'She need not know.' need
有时用作普通动词，例如：She needs to know (她需要知道)，She doesn't need to know (她不需要知道)。有时 need 用作情态动词，例如：She need know, She needn't know 或更为正式的说法：She need not know。

1. VERB (为做成某事或正常生活)要求有，必须有，需要
   If you need something, or need to do something, you cannot successfully achieve what you want or live properly without it.
   1. He desperately needed money...
      他迫切需要钱。
   2. These diets provide everything your body needs...
      这些饮食提供了你身体需要的所有营养。
   3. I need to make a phone call...
      我要打个电话。
   4. A baby does not need to wear shoes until he starts to walk...
      婴儿在开始走路前不需要穿鞋。
   5. I need you to do something for me...
      我需要你为我做点儿什么。
   6. I need you here, Wally...
      我这儿需要你，沃利。
   7. I need you sane and sober.
      我要你清醒、冷静。
   8. Need is also a noun.
      
   9. Charles has never felt the need to compete with anyone.
      查尔斯从未感到有与任何人竞争的必要。
   10. ...the child who never had his need for attention and importance satisfied.
       渴望得到关注和重视但从未获得过满足的孩子
   11. ...the special nutritional needs of the elderly.
       老年人的特殊营养需要
2. VERB (表示某一做法对某事物或地方有益)应该，应当，需要
   If an object or place needs something doing to it, that action should be done to improve the object or place. If a task needs doing, it should be done to improve a particular situation.
   1. The building needs quite a few repairs.
      该建筑有好几处应该修缮。
   2. ...a garden that needs tidying...
      应该清整的花园
   3. The taste of vitamins is not too nice so the flavour sometimes needs to be disguised.
      维生素的口味不太好，所以有时需要掩盖一下。
3. N-SING 必要;需要
   If there is a need for something, that thing would improve a situation or something cannot happen without it.
   1. Mr Forrest believes there is a need for other similar schools throughout Britain...
      福里斯特先生认为全英国都需要有类似的学校。
   2. 'I think we should see a specialist.' — 'I don't think there's any need for that.'...
      “我想我们应该见见专家。”——“我认为没有任何必要。”
   3. There's no need for you to stay.
      你不需要呆在这儿了。
4. MODAL 不必，没有必要(用于告知或建议)
   If you say that someone needn't do something, you are telling them not to do it, or advising or suggesting that they should not do it.
   1. 'I'll put the key in the window.' — 'You needn't bother,' he said gruffly...
      “我会把钥匙放在窗户里。”——“不必麻烦了，”他粗声说道。
   2. Look, you needn't shout...
      嗨，你不必大喊大叫。
   3. She need not know I'm here.
      她不必知道我在这儿。
   4. Need is also a verb.
      
   5. Well, for Heaven's sake, you don't need to apologize...
      噢，看在上天的份上，你不用道歉。
   6. Come along, Mother, we don't need to take up any more of Mr Kemp's time.
      走吧，妈妈，我们不必再打扰肯普先生了。
5. MODAL (与否定词连用)不必，没有必要
   If you tell someone that they needn't do something, or that something needn't happen, you are telling them that that thing is not necessary, in order to make them feel better.
   1. You needn't worry...
      你不必担心。
   2. This needn't take long, Simon...
      西蒙，这花不了多长时间。
   3. Buying budget-priced furniture needn't mean compromising on quality or style...
      买价钱经济的家具并不意味着就要牺牲质量和样式。
   4. Loneliness can be horrible, but it need not remain that way...
      孤独可能会很可怕，但也并非一定如此。
   5. He need never drink again if he doesn't want to.
      如果他不想喝酒的话，他可以永远不再喝了。
   6. Need is also a verb.
      
   7. He replied, with a reassuring smile, 'Oh, you don't need to worry about them.'...
      他面带让人安心的微笑回答道：“噢，你不必为他们担心。”
   8. You don't need to be a millionaire to consider having a bank account in Switzerland.
      想在瑞士银行开个账户，你不必非得是个百万富翁。
6. MODAL (与否定词连用)准许不做，可以不做
   You use needn't when you are giving someone permission not to do something.
   1. You needn't come again, if you don't want to...
      如果你不想来，可以不用再来。
   2. Well, you needn't tell me anything if you don't want to.
      好吧，如果你不想告诉我，可以什么也不说。
   3. Need is also a verb.
      
   4. You don't need to wait for me...
      你不必等我。
   5. Mommy, you don't need to stay while we talk.
      妈妈，我们谈话时你不必陪着。
7. MODAL (与否定词连用)未必，不一定
   If something need not be true, it is not necessarily true or not always true.
   1. What is right for us need not be right for others...
      对我们来说是对的东西，对别人来说未必正确。
   2. Freedom need not mean independence.
      自由不一定意味着独立。
8. MODAL (与否定词连用)本来不必，本来不需要
   If someone needn't have done something, it was not necessary or useful for them to do it, although they did it.
   1. She could have made the sandwich herself; her mum needn't have bothered to do anything...
      她本来可以自己做三明治的;她妈妈原本不必费心做任何事情。
   2. I was a little nervous when I announced my engagement to Grace, but I needn't have worried...
      我宣布和格雷丝订婚时有点紧张，但我本不必担心的。
   3. We spent a hell of a lot of money that we needn't have spent.
      我们花了很多本来不需要花的钱。
   4. If someone didn't need to do something, they needn't have done it.
      (与否定词连用)本不必做，本无须做
   5. You didn't need to give me any more money you know, but thank you.
      你看你原本不必再给我钱的，但还是要谢谢你。
9. MODAL (与否定词连用)无需说，不必说
   You use need in expressions such as I need hardly say and I needn't add to emphasize that the person you are talking to already knows what you are going to say.
   1. I needn't add that if you fail to do as I ask, you will suffer the consequences.
      如果你没按我的要求做的话，后果请自负——这话我就不必再说了吧。
   2. Need is also a verb.
      
   3. I hardly need to say that I have never lost contact with him.
      几乎不用说，我从未和他失去联系。
10. MODAL 还需要再说吗;还要我继续说吗
    You can use need in expressions such as 'Need I say more' and 'Need I go on' when you want to avoid stating an obvious consequence of something you have just said.
    1. Mid-fifties, short black hair, grey moustache, distinctive Russian accent. Need I go on?
       五十四五岁，黑色短发，灰色八字胡，明显的俄国口音，还需要我继续说吗？
11. PHRASE 贫困的;困难中的
    People in need do not have enough of essential things such as money, food, or good health.
    1. The education authorities have to provide for children in need...
       教育主管部门得救助贫困儿童。
    2. Remember that when both of you were in need, I was the one who loaned you money.
       记住，在你们两个都有困难的时候，是我借钱给你们的。
12. PHRASE 有…的需要;有…的必要
    If you are in need of something, you need it or ought to have it.
    1. I was all right but in need of rest...
       我没事，就是需要休息一下。
    2. He was badly in need of a shave...
       他早就应该刮一下胡子了。
    3. The house was in need of modernisation when they bought it.
       他们买下时，这栋房子需要进行现代化改造。
13. PHRASE 需要的话;如有必要(英国英语中亦作 if needs be)
    If you say that you will do something, especially an extreme action, if need be, you mean that you will do if it is necessary. In British English, you can also say if needs be .
    1. They will now seek permission to take their case to the House of Lords, and, if need be, to the European Court of Human Rights.
       他们现在将争取获准将案件呈交上议院审理，并且，如有必要，会上诉到欧洲人权法院。
14. PHRASE 没有必要;不必
    You can tell someone that there's no need for them to do something as a way of telling them not to do it or of telling them to stop doing it, for example because it is unnecessary.
    1. There's no need to call a doctor...
       没有必要叫医生。
    2. There's no need for that kind of language in this magazine...
       这份杂志没必要出现那种语言。
    3. 'I'm going to come with you.'—'Now look, Sue, there's no need.'
       “我跟你一起去。”——“休，你看，没这个必要。”
15. PHRASE 没人需要;没谁需要
    You can say 'Who needs something?' as a way of emphasizing that you think that this thing is unnecessary or not useful.
    1. With apologies to my old history teacher, who needs history lessons?...
       这话对不住我亲爱的历史老师，不过有谁需要历史课呢？
    2. Cigarettes, who needs them?
       香烟，谁会要呀？

1. He desperately needed money
   他迫切需要钱。
2. These diets provide everything your body needs
   这些饮食提供了你身体需要的所有营养。
3. I need to make a phone call
   我要打个电话。
4. A baby does not need to wear shoes until he starts to walk
   婴儿在开始走路前不需要穿鞋。
5. I need you to do something for me
   我需要你为我做点儿什么。
6. I need you here, Wally
   我这儿需要你，沃利。
7. I need you sane and sober.
   我要你清醒、冷静。
8. The building needs quite a few repairs.
   该建筑有好几处应该修缮。
9. The taste of vitamins is not too nice so the flavour sometimes needs to be disguised.
   维生素的口味不太好，所以有时需要掩盖一下。
10. Mr Forrest believes there is a need for other similar schools throughout Britain
    福里斯特先生认为全英国都需要有类似的学校。
11. 'I think we should see a specialist.' — 'I don't think there's any need for that.'
    “我想我们应该见见专家。”——“我认为没有任何必要。”
12. There's no need for you to stay.
    你不需要呆在这儿了。
13. She need not know I'm here.
    她不必知道我在这儿。
14. Loneliness can be horrible, but it need not remain that way
    孤独可能会很可怕，但也并非一定如此。
15. He need never drink again if he doesn't want to.
    如果他不想喝酒的话，他可以永远不再喝了。
16. What is right for us need not be right for others
    对我们来说是对的东西，对别人来说未必正确。
17. Freedom need not mean independence.
    自由不一定意味着独立。
18. Mid-fifties, short black hair, grey moustache, distinctive Russian accent. Need I go on?
    五十四五岁，黑色短发，灰色八字胡，明显的俄国口音，还需要我继续说吗？
19. The education authorities have to provide for children in need
    教育主管部门得救助贫困儿童。
20. Remember that when both of you were in need, I was the one who loaned you money.
    记住，在你们两个都有困难的时候，是我借钱给你们的。
21. I was all right but in need of rest
    我没事，就是需要休息一下。
22. He was badly in need of a shave
    他早就应该刮一下胡子了。
23. The house was in need of modernisation when they bought it.
    他们买下时，这栋房子需要进行现代化改造。
24. They will now seek permission to take their case to the House of Lords, and, if need be, to the European Court of Human Rights.
    他们现在将争取获准将案件呈交上议院审理，并且，如有必要，会上诉到欧洲人权法院。
25. There's no need to call a doctor
    没有必要叫医生。
26. There's no need for that kind of language in this magazine
    这份杂志没必要出现那种语言。
27. 'I'm going to come with you.' —'Now look, Sue, there's no need. '
    “我跟你一起去。”——“休，你看，没这个必要。”
28. With apologies to my old history teacher, who needs history lessons?
    这话对不住我亲爱的历史老师，不过有谁需要历史课呢？
29. Cigarettes, who needs them?
    香烟，谁会要呀？
30. All right, no need to say any more.
    好了，不要再说了。

  want demand need require【导航词义：需要】

  want v. 〈非正式〉需要

〔辨析〕既可指需要某事物，也可指需要某人做某事，常可与 need 换用。

  demand v. 需要

〔辨析〕指为成功做成某事而需要某事物，其主语通常为事物，而宾语多为抽象名词。

  need v. 需要

〔辨析〕最普通用词，指需要必不可少的东西或需要做某事，强调所需之物或需做之事的重要性。

  require v. 需要

〔辨析〕词义同 need，常可换用，但语气较弱。

v.

need (to have) your head examined

• 发疯
  to be crazy

n.

if need be

• 如果需要的话；有必要的话
  if necessary
  1. There's always food in the freezer if need be.
     如果需要，冰箱里总有食物。

a crying need (for sth)

• 迫切的需要
  a great and urgent need for sth

a friend in need (is a friend indeed)

• 患难的朋友（才是真正的朋友）；患难之交（见真情）
  a friend who gives you help when you need it (is a true friend)

noun

1. the psychological feature that arouses an organism to action toward a desired goal
   1. we did not understand his motivation
   2. he acted with the best of motives

   Synonym:    motivationmotive

2. anything that is necessary but lacking
   1. he had sufficient means to meet his simple needs
   2. I tried to supply his wants

   Synonym:    want

3. a condition requiring relief
   1. she satisfied his need for affection
   2. God has no need of men to accomplish His work
   3. there is a demand for jobs

   Synonym:    demand

4. a state of extreme poverty or destitution
   1. their indigence appalled him
   2. a general state of need exists among the homeless

   Synonym:    indigencepenurypauperismpauperization

verb

1. have need of
   1. This piano wants the attention of a competent tuner

   Synonym:    wantrequire

2. have or feel a need for
   1. always needing friends and money

3. require as useful, just, or proper
   1. It takes nerve to do what she did
   2. success usually requires hard work
   3. This job asks a lot of patience and skill
   4. This position demands a lot of personal sacrifice
   5. This dinner calls for a spectacular dessert
   6. This intervention does not postulate a patient's consent

   Synonym:    necessitateaskpostulaterequiretakeinvolvecall fordemand