must 的英语意思
mustmust1 /məst; strong mʌst/ modal verb (negative short form mustn’t) 
查看全部语言翻译1 (past tense had to) to have to do something because it is necessary or important, or because of a law or order因有必要、有重要性或因法律/命令规定而必须做某事: 
All passengers must wear seat belts.所有乘客必须系好安全带。 It’s getting late. I really must go.天色不早了。我真的必须走了。 You must work hard.你必须努力工作。 We must all be patient.我们大家都必须有耐心。 Must I pay now?我现在必须付钱吗？ For the engine to work, the green lever must be in the ‘up’ position.发动机要正常运转，绿色操纵杆必须处于"上"的位置。 Accidents must be reported to the safety officer.事故必须向安全官员报告。Register语体In everyday English, people usually say someone has to or has got to do something rather than say they must do something, which can sound slightly formal or emphatic:· Everyone has to wear a seat belt.· I‘ve got to go at four o’clock.· Do I have to pay now?在日常英语中，人们通常用 has to 或 has got to 表示某人必须做某事，而不用 must，因为 must 听起来可能略显正式或强调：· Everyone has to wear a seat belt.· I've got to go at four o'clock.· Do I have to pay now?2used in negative sentences to say that something should not happen, because of a rule or law or because of the situation用于否定句，表示某事不应发生，因为规则、法律或情况不允许: You mustn’t talk to your mother like that.你不能那样跟你妈妈说话。 This book must not be removed from the library.此书不得带出图书馆。 We must never forget how much we owe to these brave men.我们决不能忘记我们欠这些勇敢的人多少。 No one must disturb him while he’s sleeping.他睡觉时，任何人都不得打扰他。3used to say you think something is very likely to be true or very likely to have happened用于表示认为某事很可能是真的或很可能已经发生: Sam must be nearly 90 years old now.Sam 现在应该快 90 岁了。 His new car must have cost around £20,000.他的新车花了大约 20,000 英镑。 You must have been really upset.你当时一定非常难过。 There must be something wrong with the engine.发动机一定出了什么问题。 Karl must’ve seen ‘Star Wars’ six or seven times.Karl 一定已经看过《星球大战》六七遍了。4 spoken口语 used to suggest that someone should do something, especially because you think they will enjoy it or you think it is a good idea用于建议某人做某事，尤其是认为对方会喜欢或认为这是个好主意: You must come and stay with us in London sometime.你一定要找个时间来伦敦和我们住在一起。 ‘We must do this again,’ he said. ‘I’ve enjoyed it thoroughly.’"我们一定要再来一次，"他说道，"我玩得非常尽兴。"5especially British English spoken口语 used to say that you intend or want to do something用于表示打算或想要做某事: I must call her tonight.我今晚一定要给她打电话。6I must admit/say/confess spoken口语 used to emphasize what you are saying用于强调所说的话: I must say, it gave me quite a shock.我必须说，这给了我相当大的震惊。7(why) must you ...? spoken口语 used to tell someone that their behaviour upsets or annoys you用于表示某人的行为令你心烦或恼怒: Must you spoil everything?你非得把什么都搞砸吗？ Why must you always be so suspicious?你为什么总是这么多疑？8a must-have/must-see/must-read etc informal非正式 something that is so good, exciting, or interesting that you think people should have it, see it etc指某事物极好、令人兴奋或有趣，以至于认为人们应当拥有、观看等: The exhibit is a must-see for anyone interested in Japanese art.这次展览是所有对日本艺术感兴趣的人必看的。 a must-read novel必读小说9if you must (do something) spoken口语 used to tell someone that they are allowed to do something, but that you do not approve of it or agree with it用于告诉某人他们被允许做某事，但你并不赞同或认可: All right, come along, if you must.好吧，一起来吧，如果你非要来的话。 If you must smoke, please go outside.如果你非要抽烟，请到外面去。10if you must know spoken口语 used when you answer a question that you think someone should not have asked, because it is slightly impolite用于回答一个认为对方不该问的问题，因为这问题略显失礼: Well, if you must know, I’m thirty-six.好吧，如果你非要知道，我三十六岁。 → you must be joking at joke2(2)GRAMMAR: Comparison语法：比较must• You say that you must do something: · I must get a new key.• 表示必须做某事时用 must：· I must get a new key.• Don’t use ‘to’ after must. ✗Don’t say: I must to get a new key.• must 后不加 to。✗ 不要说：I must to get a new key.• You use must not when saying someone should not do something, for example because it is dangerous or wrong: · You must not leave without telling me where you’re going.• 表示某人不应做某事（如因危险或错误）时，用 must not：· You must not leave without telling me where you're going.• You say that something must have happened, or that someone must have done something, when you are fairly sure that this is true, based on what you know: · They must have caught an earlier train.• 根据所知情况相当确信某事发生过或某人做过某事时，用 must have：· They must have caught an earlier train.have to• You say that you have to do something: · She has to do some shopping.• 表示必须做某事时，用 have to：· She has to do some shopping.• You use don’t have to when it is not necessary for someone to do something: · You don’t have to leave yet.• 表示某人没有必要做某事时，用 don't have to：· You don't have to leave yet.• You use had to instead of ‘must’ when talking about the past: · He had to get up early the next day.• 谈论过去时，用 had to 代替 must：· He had to get up early the next day.Grammar guide ‒ VERBSTHESAURUS同义词辨析must do something used when saying that it is very important that someone does something, because someone in authority or a rule says this, or because of the situation用于强调某人做某事非常重要，因为权威人士或规则要求如此，或因为情况所迫: · You must be home by midnight.· 你必须在午夜之前回家。· He must not smoke in here.· 他不能在这里抽烟。· I must remember to call her.· 我一定要记得给她打电话。have to do something to need to do something because it is necessary or important因必要或重要而需要做某事: · I have to go home early.· 我得早点回家。· She has to talk to him first.· 她必须先跟他谈谈。be obliged to do something to have to do something, because of a rule or law, or because of the situation you are in因规则、法律或所处情况而必须做某事: · Members of parliament are obliged to declare all their financial interests.· 议员必须申报其所有财务利益。· He was obliged to admit defeat.· 他不得不承认失败。be required to do something formal正式 to have to do something because of a rule or law – used especially in written notices and official documents因规则或法律而必须做某事——尤用于书面通知和官方文件: · New students are required to register with a doctor.· 新生须向医生进行登记注册。have an obligation to do something (also be under an obligation to do something) to have to do something because it is the duty of someone in your position to do it, or because you have officially agreed to do it因自己所在职位的职责所在，或因已正式同意而必须做某事: · The landlord is under an obligation to keep the building in good repair.· 房东有义务保持建筑物处于良好的维修状态。be forced/compelled to do something to have to do something that you do not want to do, because you are in a situation that makes it impossible to avoid因身处无法回避的处境而不得不做自己不想做的事: · She was forced to retire early due to ill health.· 她因健康不佳被迫提前退休。
查看全部语言翻译1 (past tense had to) to have to do something because it is necessary or important, or because of a law or order因有必要、有重要性或因法律/命令规定而必须做某事: All passengers must wear seat belts.所有乘客必须系好安全带。 It’s getting late. I really must go.天色不早了。我真的必须走了。 You must work hard.你必须努力工作。 We must all be patient.我们大家都必须有耐心。 Must I pay now?我现在必须付钱吗？ For the engine to work, the green lever must be in the ‘up’ position.发动机要正常运转，绿色操纵杆必须处于"上"的位置。 Accidents must be reported to the safety officer.事故必须向安全官员报告。Register语体In everyday English, people usually say someone has to or has got to do something rather than say they must do something, which can sound slightly formal or emphatic:· Everyone has to wear a seat belt.· I‘ve got to go at four o’clock.· Do I have to pay now?在日常英语中，人们通常用 has to 或 has got to 表示某人必须做某事，而不用 must，因为 must 听起来可能略显正式或强调：· Everyone has to wear a seat belt.· I've got to go at four o'clock.· Do I have to pay now?2used in negative sentences to say that something should not happen, because of a rule or law or because of the situation用于否定句，表示某事不应发生，因为规则、法律或情况不允许: You mustn’t talk to your mother like that.你不能那样跟你妈妈说话。 This book must not be removed from the library.此书不得带出图书馆。 We must never forget how much we owe to these brave men.我们决不能忘记我们欠这些勇敢的人多少。 No one must disturb him while he’s sleeping.他睡觉时，任何人都不得打扰他。3used to say you think something is very likely to be true or very likely to have happened用于表示认为某事很可能是真的或很可能已经发生: Sam must be nearly 90 years old now.Sam 现在应该快 90 岁了。 His new car must have cost around £20,000.他的新车花了大约 20,000 英镑。 You must have been really upset.你当时一定非常难过。 There must be something wrong with the engine.发动机一定出了什么问题。 Karl must’ve seen ‘Star Wars’ six or seven times.Karl 一定已经看过《星球大战》六七遍了。4 spoken口语 used to suggest that someone should do something, especially because you think they will enjoy it or you think it is a good idea用于建议某人做某事，尤其是认为对方会喜欢或认为这是个好主意: You must come and stay with us in London sometime.你一定要找个时间来伦敦和我们住在一起。 ‘We must do this again,’ he said. ‘I’ve enjoyed it thoroughly.’"我们一定要再来一次，"他说道，"我玩得非常尽兴。"5especially British English spoken口语 used to say that you intend or want to do something用于表示打算或想要做某事: I must call her tonight.我今晚一定要给她打电话。6I must admit/say/confess spoken口语 used to emphasize what you are saying用于强调所说的话: I must say, it gave me quite a shock.我必须说，这给了我相当大的震惊。7(why) must you ...? spoken口语 used to tell someone that their behaviour upsets or annoys you用于表示某人的行为令你心烦或恼怒: Must you spoil everything?你非得把什么都搞砸吗？ Why must you always be so suspicious?你为什么总是这么多疑？8a must-have/must-see/must-read etc informal非正式 something that is so good, exciting, or interesting that you think people should have it, see it etc指某事物极好、令人兴奋或有趣，以至于认为人们应当拥有、观看等: The exhibit is a must-see for anyone interested in Japanese art.这次展览是所有对日本艺术感兴趣的人必看的。 a must-read novel必读小说9if you must (do something) spoken口语 used to tell someone that they are allowed to do something, but that you do not approve of it or agree with it用于告诉某人他们被允许做某事，但你并不赞同或认可: All right, come along, if you must.好吧，一起来吧，如果你非要来的话。 If you must smoke, please go outside.如果你非要抽烟，请到外面去。10if you must know spoken口语 used when you answer a question that you think someone should not have asked, because it is slightly impolite用于回答一个认为对方不该问的问题，因为这问题略显失礼: Well, if you must know, I’m thirty-six.好吧，如果你非要知道，我三十六岁。 → you must be joking at joke2(2)GRAMMAR: Comparison语法：比较must• You say that you must do something: · I must get a new key.• 表示必须做某事时用 must：· I must get a new key.• Don’t use ‘to’ after must. ✗Don’t say: I must to get a new key.• must 后不加 to。✗ 不要说：I must to get a new key.• You use must not when saying someone should not do something, for example because it is dangerous or wrong: · You must not leave without telling me where you’re going.• 表示某人不应做某事（如因危险或错误）时，用 must not：· You must not leave without telling me where you're going.• You say that something must have happened, or that someone must have done something, when you are fairly sure that this is true, based on what you know: · They must have caught an earlier train.• 根据所知情况相当确信某事发生过或某人做过某事时，用 must have：· They must have caught an earlier train.have to• You say that you have to do something: · She has to do some shopping.• 表示必须做某事时，用 have to：· She has to do some shopping.• You use don’t have to when it is not necessary for someone to do something: · You don’t have to leave yet.• 表示某人没有必要做某事时，用 don't have to：· You don't have to leave yet.• You use had to instead of ‘must’ when talking about the past: · He had to get up early the next day.• 谈论过去时，用 had to 代替 must：· He had to get up early the next day.Grammar guide ‒ VERBSTHESAURUS同义词辨析must do something used when saying that it is very important that someone does something, because someone in authority or a rule says this, or because of the situation用于强调某人做某事非常重要，因为权威人士或规则要求如此，或因为情况所迫: · You must be home by midnight.· 你必须在午夜之前回家。· He must not smoke in here.· 他不能在这里抽烟。· I must remember to call her.· 我一定要记得给她打电话。have to do something to need to do something because it is necessary or important因必要或重要而需要做某事: · I have to go home early.· 我得早点回家。· She has to talk to him first.· 她必须先跟他谈谈。be obliged to do something to have to do something, because of a rule or law, or because of the situation you are in因规则、法律或所处情况而必须做某事: · Members of parliament are obliged to declare all their financial interests.· 议员必须申报其所有财务利益。· He was obliged to admit defeat.· 他不得不承认失败。be required to do something formal正式 to have to do something because of a rule or law – used especially in written notices and official documents因规则或法律而必须做某事——尤用于书面通知和官方文件: · New students are required to register with a doctor.· 新生须向医生进行登记注册。have an obligation to do something (also be under an obligation to do something) to have to do something because it is the duty of someone in your position to do it, or because you have officially agreed to do it因自己所在职位的职责所在，或因已正式同意而必须做某事: · The landlord is under an obligation to keep the building in good repair.· 房东有义务保持建筑物处于良好的维修状态。be forced/compelled to do something to have to do something that you do not want to do, because you are in a situation that makes it impossible to avoid因身处无法回避的处境而不得不做自己不想做的事: · She was forced to retire early due to ill health.· 她因健康不佳被迫提前退休。