/məst;strong form mʌst ||; məst; mʌst/modal verb (
negative must not short form mustn't /ˈmʌsnt
||; ˈmʌsṇt/)
1 used for saying that it is necessary that sth happens （表示必须）: I must remember to go to the bank today. 我今天一定要记得去银行。You mustn't take photographs in here. It's forbidden. 你不可在这里拍照，这里禁止摄影。
2 used for saying that you feel sure that sth is true （表示肯定）: Have something to eat. You must be hungry. 吃点东西吧，你一定饿了。I can't find my cheque book. I must have left it at home. 我找不到我的支票簿，必定是留在家里了。
3 used for giving sb advice （用于提供意见）: You really must see that film. It's wonderful. 你真的该去看看那部电影，真精彩。 ☞For more information about modal verbs, look at the Quick Grammar Reference section at the back of this dictionary. 有关情态动词的详细用法，参看本词典末“语法便览”部份。