must

aux.

必须；必然要；（做出逻辑推断）；（表示坚持）

n.

必须做的事，必不可少的事物；葡萄汁；霉臭；麝香

vt.& vi.

（表示必要或很重要）必须；（提出建议）应该；得；（表示很可能或符合逻辑）一定

adj.

不可或缺的；狂暴的；

复数：musts过去式：must过去分词：must现在分词：musting第三人称单数：musts

must be一定；一定要；肯定是

must have必须拥有；非有不可

must have been一定（对过去事实肯定的推测）

must have done必定做了…（表示对过去的推测）

must be going该告辞了；必须去

must be off[口]该走了

must needs偏要；偏偏

must be valid必须实事求是

1. Something must be done about it.
   必须得想个办法。
2. In England traffic must keep to the left.
   在英国，车辆必须靠左行驶。
3. We must make allowance for his youth.
   我们应当考虑到他还年轻。
4. One must honor his contract and keep his word.
   任何人都应当尊重合同，信守诺言。
5. The dictionary must be on the bookshelf in my bedroom.
   词典很可能丢在卧室的书架上。

1. A raincoat is a must in the rainy season.
   在雨季雨衣是必备之物。
2. His new novel is a must for all lovers of crime fiction.
   他的新小说是罪案小说爱好者必须一读的。

If it changes it must be a process: study of emotion and coping during three stages of a college examination.
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Bernie Sanders: We must stop this corporate takeover of American democracy: http://bit.ly/wBtxyu #OWS #ConnectTheLeft