| 释义 |
must NECESSARYmQstvaux [+ infinitive without to; not be musting] he/she/it must used to show that it is necessary or very important that something happens in the present or future必须You must take these pills every day.你必须每天吃这种药。This letter must not be shown to anyone else.这封信千万不能给别人看。Luggage must not be left unattended (= it is against the rules).行李不准无人照看。"Must you leave so soon?" "Yes, I must."“你非得这么早走吗？”“是的，我得走了。”"Can you let me come in?" "No, I mustn't."“你能让我进来吗？”“不，我不能。”"Must I sign this?" "No, you needn't."“我必须在这上面签字吗？”“不，你不必。”If you say that you must do something, you might mean that you have a firm intention to do something in the future.一定要，坚持要I must phone my sister.我一定要打电话给我姐姐/妹妹。I mustn't bite my nails.我一定不能咬指甲。We mustn't argue any more.我们不要再吵架了。Must is sometimes used for emphasis.必须I must admit I didn't know what to do.我得承认我不知所措。You're looking very well, I must say.我得说，你看上去很好。If you tell someone else that they must do something pleasant, you are emphasizing that you think it is a good idea for them to do that.务必，一定要You must come and stay with us for the weekend.你一定要来和我们度周末。We must meet for lunch soon.不久后我们一定要一起吃午饭。When talking about things that were necessary in the past, it is usual to use had to.表示过去义务用 had toI must go tomorrow.我明天得走了。I had to go yesterday.我昨天不得不走。When describing what someone said in the past, must or had to can be used as the past form.当描述某人过去说的话时，must 或had to可用作过去式He told me that I must sit down means He said "You must sit down".“他对我说我一定要坐下”意指:“他说:‘你一定要坐下。’”
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