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must的用法

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  must有必须;应当;很可能的意思,那么你知道must的用法吗?下面跟着学习啦小编一起来学习一下,希望对大家的学习有所帮助!

  must的用法:

  表示义务、意图或建议:必须,应该

  I must leave at six today. 我今天必须六点钟离开。

  I must write a letter to the head teacher. 我非得给校长写封信不可。(强烈意图)

  You must go and see that film——you'd really enjoy it. 你得去看看那部电影,你会真的喜欢它的。(提建议)

  表示推测:必定,一定

  The light is still on, so he must be at home. 灯还是亮的,他一定在家。

  The light was out. They must have gone to bed. 灯都熄了,他们必定睡了。

  注意:1. must表示推测时的否定式是can't或couldn't(不可能) ,因为must只用于肯定句,语气很强。2. 若对过去情况的推测用must have加过去分词。

  表示主张:硬要,一定要

  If you must go, at least wait till the rain stops. 如果你坚持要走,至少也要等雨停了再走。

  The machine must break down at this busy hour. 正忙的时候机器偏偏坏了。

  表示不可避免性:必然要,必定会

  All men must die. 人总有一死。

  “must+be”“must+be+ v -ing”“must+表示状态的动词”可表示现在或一般的情况; “must+have”表示过去的情况; “must+表示动作的动词”表示将来的情况。

  must可表示讽刺或抱怨,此时须以you为主语。

  must表示客观上不愉快的情况,意为“偏偏”。

  must还可用作名词,作“必须做的事,必不可少的事物”解,常用于单数形式。例如:Warm clothes are a must in the mountains.到山区去穿暖和的衣服是必须的。

  must英语例句:

  1. You must have noticed how tired he sometimes looks.

  你一定注意到他有时候显得特别疲惫。

  2. "His memory must be completely back, then?" — "Just about."

  “这么说,他的记忆一定是完全恢复了?”——“差不多。”

  3. There must be any number of people in my position.

  一定有很多人处在我这种境况。

  4. I must have driven past that place thousands of times.

  我得有上千次开车经过那里。

  5. "You must come to Tinsley's graduation party." — "I'd be delighted."

  “你一定要来参加廷斯利的毕业聚会。”——“我很乐意。”

  6. Builders must fasten down roofs of newly-built homes more securely.

  建造工人必须把新建房屋的屋顶固定得更牢靠些。

  7. "You must be expecting a young man," she teased.

  “你一定是在等哪位小伙子吧,”她揶揄道。

  8. It must have reinforced my determination to blend into my surroundings.

  这势必让我更加下定决心融入周围环境。

  9. That's why I must trust you to keep this secret.

  那就是为什么我必须得相信你会保守这个秘密的原因。

  10. Occasionally a patient is so debilitated that he must be fed intravenously.

  偶尔会有病人过于虚弱,必须通过静脉注射进食。

  11. The uncertainty created by this situation must be confusing for you.

  这种局面所造成的不确定性肯定让你感到困惑。

  12. Vintage ports must be decanted to remove natural sediments.

  上等的波尔图葡萄酒必须倒入其他容器中以滤除自然沉淀物。

  13. Your decision must be translated into specific, concrete actions.

  你的决定必须转化为具体明确的行动。

  14. Some thought must be given to the method of validation.

  一些想法必须通过验证法加以证实。

  15. The rules state that samples must be enclosed in two watertight containers.

  规则要求样本必须装在两个水密容器中。

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