must

modal verb

1. （表示必要或很重要）必须
   used to say that sth is necessary or very important (sometimes involving a rule or a law)
   1. All visitors must report to reception.
      所有来宾必须到接待处报到。
   2. Cars must not park in front of the entrance (= it is not allowed) .
      车辆不得停在入口处。
   3. I must ask you not to do that again.
      我得劝你别再那样做了。
   4. You mustn't say things like that.
      你千万别说那样的话。
   5. I must go to the bank and get some money.
      我得上银行取点儿钱。
   6. I must admit (= I feel that I should admit) I was surprised it cost so little.
      我得承认，这么便宜，真让我惊讶。
   7. Must you always question everything I say? (= it is annoying)
      我说什么你都非要提出质疑吗？
   8. ‘Do we have to finish this today?’ ‘Yes, you must.’
      “我们今天一定得完成这工作吗？”“对，必须完成。”
2. （表示很可能或符合逻辑）一定
   used to say that sth is likely or logical
   1. You must be hungry after all that walking.
      走了这么远的路，你一定饿了吧。
   2. He must have known (= surely he knew) what she wanted.
      他一定早已知道她想要什么了。
   3. I'm sorry, she's not here. She must have left already (= that must be the explanation) .
      抱歉，她不在这儿。准是走了。
3. （提出建议）应该，得
   used to recommend that sb does sth because you think it is a good idea
   1. You simply must read this book.
      这本书你可一定要看一看。
   2. We must get together soon for lunch.
      我们得马上集合去吃午饭。

noun

1. 必须做（或看、买等）的事
   something that you must do, see, buy, etc.
   1. His new novel is a must for all lovers of crime fiction.
      他的新作是所有犯罪小说爱好者的必读书。

Must is a modal verb. It is followed by the base form of a verb.
must为情态动词，后跟动词原形。

The noun is pronounced /mʌst/. 名词读作 /mʌst/。


1. MODAL 必须；一定要
   You use must to indicate that you think it is very important or necessary for something to happen. You use must not or mustn't to indicate that you think it is very important or necessary for something not to happen.
   1. What you wear should be stylish and clean, and must definitely fit well...
      你的穿着应该整洁漂亮，而且必须非常合身。
   2. You are going to have to take a certain amount of criticism, but you must cope with it...
      你肯定会遭到一些批评，但你必须去面对。
   3. The doctor must not allow the patient to be put at risk...
      医生决不能置患者于危险境地而不顾。
   4. The soil must not be overwatered, especially during the first few weeks...
      切忌土壤过涝，尤其在最初几周。
   5. We must not forget your birthday.
      我们一定不能忘了你的生日。
2. MODAL (通常因为规定或法律)必须，应当
   You use must to indicate that it is necessary for something to happen, usually because of a rule or law.
   1. Candidates must satisfy the general conditions for admission...
      候选人必须满足参选的总体条件。
   2. Mr Allen must pay Mr Farnham's legal costs...
      艾伦先生应当支付法纳姆先生的诉讼费。
   3. Equipment must be supervised if children are in the house.
      如果孩子们在屋里，必须有人监管设备。
3. MODAL (用于表示肯定推测)一定，谅必
   You use must to indicate that you are fairly sure that something is the case.
   1. At 29 Russell must be one of the youngest ever Wembley referees...
      29岁的拉赛尔一定是有史以来温布利球场上的裁判员中最年轻的一个。
   2. Reggae must be the only music that's got its own country — Jamaica...
      雷盖音乐得到了一整个国家人民的支持，这个国家就是牙买加——这一点上它无疑是独一无二的。
   3. I'm sure he must feel he has lost a close family friend, because I know I do...
      我敢说他一定觉得自己失去了一位亲密的世交，因为我知道我是这种感觉。
   4. I must have been a bore.
      我一定让人觉得很无聊。
4. MODAL (用于表示据已知情况推测)很可能是，想必是，肯定是
   You use must, or must have with a past participle, to indicate that you believe that something is the case, because of the available evidence.
   1. 'You must be Emma,' said the visitor...
      来客说：“你肯定是埃玛。”
   2. Miss Holloway had a weak heart. She must have had a heart attack...
      霍洛韦小姐心脏不好，她肯定得过心脏病。
   3. His only explanation was that he must have brought them home in order to continue his work...
      他唯一的解释是，自己想必是为了继续工作而把它们带回家了。
   4. The medical reports really must have suggested that he was really seriously hurt.
      医学报告肯定已经指出他伤得的确很重。
5. MODAL (用于表示前者为后者的前提)应该已经(发生)
   If you say that one thing must have happened in order for something else to happen, you mean that it is necessary for the first thing to have happened before the second thing can happen.
   1. In order to take that job, you must have left another job...
      为得到那份工作，你肯定已辞去了另一份工作。
   2. In order to start reading this book you must have had some idea that the physical symptoms you were experiencing were due to anxiety.
      开始读这本书之前，你一定已经了解到：你身体的不适症状是源于焦虑。
6. MODAL (用于表示意图)一定要，坚持要
   You use must to express your intention to do something.
   1. I must be getting back...
      我一定要回来。
   2. I must have a whiskey...
      我要喝杯威士忌。
   3. I must telephone my parents...
      我一定要给父母打电话。
   4. I must speak to Tania at once...
      我要马上跟塔尼娅讲话。
   5. He told the Prime Minister that he felt he must now leave.
      他告诉首相，他感觉自己现在必须要离开了。
7. MODAL (用于表示建议或邀请)务必，一定要
   You use must to make suggestions or invitations very forcefully.
   1. You must see a doctor, Frederick...
      弗雷德里克，你一定得去看医生。
   2. You must see the painting Paul has given me as a wedding present...
      你一定要看看保罗送给我作结婚礼物的那幅画。
   3. You must come to lunch with us...
      你一定要来和我们一起吃午饭。
   4. You must visit me. Come to dinner.
      你一定要来我家吃晚饭。
8. MODAL (用于表示同情)必定，想必
   You use must in remarks and comments where you are expressing sympathy.
   1. This must be a very difficult job for you...
      对你来说，这份工作想必很难。
   2. You must be very worried by now...
      你现在一定非常担心。
   3. Now sit down and make yourself comfortable. You must be very tired.
      现在坐下来，让自己舒服些，你一定很累了。
9. MODAL (用于强调)我得说/我得承认
   You use must in conversation in expressions such as 'I must say' and 'I must admit' in order to emphasize a point that you are making.
   1. This came as a surprise, I must say...
      我得说这真是个意外。
   2. I must admit I like looking feminine...
      我得承认我喜欢看起来淑女一些。
   3. They were very polite, I must confess.
      我得承认他们很有礼貌。
10. MODAL (用于引起读者或听众的注意)一定要注意/一定记住
    You use must in expressions such as 'it must be noted' and 'it must be remembered' in order to draw the reader's or listener's attention to what you are about to say.
    1. It must be noted, however, that not all British and American officers carried out orders...
       然而，一定要注意不是所有的英国和美国军官都执行了命令。
    2. It must be stated that this illness is one of the most complex conditions known to man.
       必须声明，这种疾病是人类已知的最为复杂的疾病之一。
11. MODAL (用于问句中表示生气)偏偏，非要
    You use must in questions to express your anger or irritation about something that someone has done, usually because you do not understand their behaviour.
    1. Why must you do everything as if you have to win?...
       你为什么做每件事情都跟你非要赢似的？
    2. Why must she inter-rupt?...
       她为什么非要插嘴？
    3. Must you always run when the pressure gets too much?
       难道压力一大你就非要逃开吗？
12. MODAL (用于感叹句，表示惊讶或震惊)一定是，准是
    You use must in exclamations to express surprise or shock.
    1. 'Go! Please go.' — 'You must be joking!'...
       “走吧！请走吧。”——“你一定是在开玩笑吧！”
    2. I really must be quite mad!...
       真的，我一定是气坏了！
    3. You must have gone out of your mind!
       你准是疯了！
13. N-COUNT 必不可少的事物;一定要做的事
    If you refer to something as a must, you mean that it is absolutely necessary.
    1. The new 37th issue of National Savings Certificates is a must for any taxpayer...
       新发行的第37期国家储蓄债券是任何一个纳税人的必然之选。
    2. A must is a visit to the fascinating and world-renowned Motor Museum.
       一定要去参观一下那个举世闻名且精彩有趣的汽车博物馆。
14. PHRASE 如果你一定要(这样做的话)
    You say 'if you must' when you know that you cannot stop someone doing something that you think is wrong or stupid.
    1. If you must be in the sunlight, use the strongest filter cream you can get...
       如果一定要呆在太阳底下的话，就擦上你能买到的防晒系数最高的防晒霜。
    2. 'Could I have a word?' — 'Oh dear, if you must.'...
       “我能说一句吗？”——“亲爱的，如果你非说不可的话，好吧。”
    3. If you must have a cigarette, choose a seat in the first row of the smoking section.
       如果你一定要吸烟的话，去吸烟区的第一排找个座位。
15. PHRASE 如果你一定想要知道的话
    You say 'if you must know' when you tell someone something that you did not want them to know and you want to suggest that you think they were wrong to ask you about it.
    1. 'Why don't you wear your jogging shorts Mum?' — 'Well, my legs are too skinny, if you must know.'
       “妈妈，为什么不穿你的慢跑短裤呢？”——“哦，如果你非要问的话，因为我的腿太瘦了。”
    2. 'You told him you'd been there that night.' — 'If you must know, yes.'
       “你跟他说过你那天夜里去过那儿了。”——“是的，如果你非要问的话。”

1. What you wear should be stylish and clean, and must definitely fit well
   你的穿着应该整洁漂亮，而且必须非常合身。
2. You are going to have to take a certain amount of criticism, but you must cope with it
   你肯定会遭到一些批评，但你必须去面对。
3. The doctor must not allow the patient to be put at risk
   医生决不能置患者于危险境地而不顾。
4. The soil must not be overwatered, especially during the first few weeks
   切忌土壤过涝，尤其在最初几周。
5. We must not forget your birthday.
   我们一定不能忘了你的生日。
6. Candidates must satisfy the general conditions for admission
   候选人必须满足参选的总体条件。
7. Mr Allen must pay Mr Farnham's legal costs
   艾伦先生应当支付法纳姆先生的诉讼费。
8. Equipment must be supervised if children are in the house.
   如果孩子们在屋里，必须有人监管设备。
9. At 29 Russell must be one of the youngest ever Wembley referees
   29岁的拉赛尔一定是有史以来温布利球场上的裁判员中最年轻的一个。
10. Reggae must be the only music that's got its own country — Jamaica
    雷盖音乐得到了一整个国家人民的支持，这个国家就是牙买加——这一点上它无疑是独一无二的。
11. I'm sure he must feel he has lost a close family friend, because I know I do
    我敢说他一定觉得自己失去了一位亲密的世交，因为我知道我是这种感觉。
12. I must have been a bore.
    我一定让人觉得很无聊。
13. 'You must be Emma,' said the visitor
    来客说：“你肯定是埃玛。”
14. Miss Holloway had a weak heart. She must have had a heart attack
    霍洛韦小姐心脏不好，她肯定得过心脏病。
15. His only explanation was that he must have brought them home in order to continue his work
    他唯一的解释是，自己想必是为了继续工作而把它们带回家了。
16. The medical reports really must have suggested that he was really seriously hurt.
    医学报告肯定已经指出他伤得的确很重。
17. In order to take that job, you must have left another job
    为得到那份工作，你肯定已辞去了另一份工作。
18. In order to start reading this book you must have had some idea that the physical symptoms you were experiencing were due to anxiety.
    开始读这本书之前，你一定已经了解到：你身体的不适症状是源于焦虑。
19. I must be getting back
    我一定要回来。
20. I must telephone my parents
    我一定要给父母打电话。
21. I must speak to Tania at once
    我要马上跟塔尼娅讲话。
22. You must see a doctor, Frederick
    弗雷德里克，你一定得去看医生。
23. This must be a very difficult job for you
    对你来说，这份工作想必很难。
24. This came as a surprise, I must say
    我得说这真是个意外。
25. It must be noted, however, that not all British and American officers carried out orders
    然而，一定要注意不是所有的英国和美国军官都执行了命令。
26. Why must you do everything as if you have to win?
    你为什么做每件事情都跟你非要赢似的？
27. 'Go! Please go.' — 'You must be joking!'
    “走吧！请走吧。”——“你一定是在开玩笑吧！”
28. The new 37th issue of National Savings Certificates is a must for any taxpayer
    新发行的第37期国家储蓄债券是任何一个纳税人的必然之选。
29. If you must be in the sunlight, use the strongest filter cream you can get
    如果一定要呆在太阳底下的话，就擦上你能买到的防晒系数最高的防晒霜。
30. 'Why don't you wear your jogging shorts Mum?' — 'Well, my legs are too skinny, if you must know.'
    “妈妈，为什么不穿你的慢跑短裤呢？”——“哦，如果你非要问的话，因为我的腿太瘦了。”

  oblige have to must【导航词义：必须】

  oblige v. 〈正式〉非做…不可，迫使

〔辨析〕指因法律、义务、形势等关系而不得不做某事，通常用被动语态。

  have to modal v. 必须，不得不

〔辨析〕指客观情况迫使某人做某事，侧重于客观上的“必须”。

  must modal v. 必须

〔辨析〕指因需要、命令或强制而必得做某事，侧重于主观上的“必须”。

modal verb

if you must (do sth)

• （表示虽不赞同但可允许）如果你一定要（那么做）
  used to say that sb may do sth but you do not really want them to
  1. ‘Can I smoke?’ ‘If you must.’
     “我可以抽烟吗？”“如果你一定要抽的话。”
  2. It's from my boyfriend, if you must know .
     倘使你一定要知道的话，这是我男朋友给的。

must-see/must-read/must-have, etc.

• 必看（或必读、必备等）
  used to tell people that sth is so good or interesting that they should see, read, get it, etc.
  1. Sydney is one of the world's must-see cities.
     悉尼是世界上的必游城市之一。
  2. The magazine is a must-read in the show business world.
     这份杂志是演艺界人士的必读刊物。

noun

1. the quality of smelling or tasting old or stale or mouldy

   Synonym:    mustinessmoldiness

2. grape juice before or during fermentation

3. a necessary or essential thing
   1. seat belts are an absolute must