must的用法高三网,must语法口诀

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测一测

—My daughter just got a scholarship to Stanford! —You ____ be proud of her.

A. could

B. must

C. might

知识点解析

在英语考试中,情态动词可是一个无论如何也绕不开的考点。
今天,小编给大侠们梳理下情态动词中的明星—must的常见用法。

1.must的一个常见意思是“想必,一定”,用于表示很有把握的推测。比如:

Harry's been driving all day; he must be tired.
哈里开了一天车,他一定累了。

I didn't hear the phone. I must have been asleep.
我没听见电话,我肯定是睡着了。(这句话简直是生活中的高频句啊!)

如果句子中有表示不确定的词时,不能用must。以一道08年真题为例:

-Is Mr. Brown driving here? -I'm not sure. He may come by train. (√)
-Is Mr. Brown driving here? -I'm not sure. He must come by train. (×)


2.must另外一个意思是“必须”,用于表示做某事很必要或者很重要。比如:

All visitors must report to reception.
所有来宾必须到接待处报到。

A: Do I have to finish this today?
B: Yes, you must.
A: 我今天必须要做完这个吗?
B: 对,必须完成。

注意,当must表示“必须(做某事)”这个意思时,其否定形式为don’t have to或needn’t,所以上个例句的否定回答如下:

No, you don't have to. (√)
No, you needn't. (√)
No, you mustn't. (×)


3.must还可以用于表示建议或邀请,意思是“务必,一定要”。

假如你发现了一本好书,想推荐给朋友,你就可以说:

You must read this book.
这本书你可一定要看一看。

再比如,你翻开旅游杂志,经常会看到如下标题:

10 Things You Must Do in Paris
在巴黎你一定要做的10件事

5 Foods You Must Eat in Canada
在加拿大你一定要品尝的5种食物


好了,今天的内容就到这里,下面是大侠们的答题时间~

小练习

Four hundred dollars for a pair of shoes, you ____ be joking!

A. can

B. need

C. must

-Must I get there on time? -No, you ____.

A. can't

B. mustn't

C. needn't

I'm sorry. I ___ go now. My father told me on the phone that my mother was ill.

A. can

B. must

C. may

考试真题

在近几年全国和各地中高考、CET4、CET6和考研试卷中,

情态动词must高频出现, 以下是几个例子:

You must be Carol. You haven’t changed a bit after all these years.

You must be careful with the camera. It costs!(2015 四川高考)

It's getting late. I really must go now, My daughter is home alone.(2015 北京高考)

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