河北衡水高中英语新高考语法学习讲义(036)情态动词must用法知识点总结整理

2020年河北衡水高中英语新高考语法学习讲义（036）情态动词must用法知识点总结整理
must的用法
1. 表示必须。

must 表示现在或将来必须要做某事，这种“必须”多是出于义务、责任或强制命令。

如：
I must go now.
我必须走了。

Soldiers must obey orders.
军人必须服从命令。

You must hand in your homework today.
你今天必须把作业交来。

We must do everything carefully.
我们必须认真做每件事。

Patrick told me I must be there on time.
帕特里克告诉我必须准时到达。

—Must I come tomorrow?
—我明天必须来吗？
—Yes, you must. / No, you needn't.
—是，必须来。

/ 不，不必来。

例题：
1. — I fill in the check-in form right now, sir?
—No, you needn't. You can complete it this afternoon.
A.May
B.Can
C.Would
D. Must
【答案选D】must 表示“必须”，其否定回答“不必”为needn't，而不是mustn't，mustn't 表示“不允许，禁止”之意。

2. —Must he come to sign this paper himself?
—Yes, he .
A.need
B. must
C. may
D. will
【答案选B】根据题意：“他必须亲自来签署这份文件吗？”“是的，他必须来。

”对must引起的疑问句的肯定回答用must，否定回答用needn't。

2. mustn't 表示禁止。

如：
You mustn't leave here.
你不许离开这儿。

Cars mustn't be parked in front of the entrance.
车不能停在入口处前。

例题：
1. You play football on the street. It s dangerous.
A.mustn't
B. may
C. can't
D. must
【答案选A】在街上踢球是非常危险的，所以绝对不可以。

2. Tom, you leave all your clothes on the floor like this!
A. wouldn't
B. mustn't
C. needn't
D. may not
【答案选B】考查情态动词。

mustn't这里表示“不允许、禁止”，此句中相当于can't。

3. 表示建议。

如：
We must see what can be done.
我们应看看能做些什么。

You mustn't miss the play. It is very good.
你不要错过那个剧，它非常好。

You must come to supper tonight.
你今晚一定来吃晚饭啊。

4. 表推测。

must 表推测时用于肯定句中，表示较肯定的推测。

如：
Leo must be at home now.
雷欧现在肯定在家。

Kelly must be over fifty.
凯莉一定五十多岁了。

You must have known what he wanted then.
你肯定知道他当时想干什么。

You must be joking.
你一定是在开玩笑。

例题：
—Where is Jack, please?
—He be in the reading room.
A. can
B. need
C. would
D. must
【答案选D】在回答杰克的去处时可以回答可能或肯定，但选项里没有表可能的，意思是他肯定在阅览室里。

有时表“偏偏”这个意思。

如：
Just as I was getting better, what must I do but break my leg.
我正痊愈起来时偏偏把腿又摔断了。

The car must break down just when we were about to start off.
我们正要出发时偏偏车又坏了。

At time when everybody was in bed, he must turn his radio on.
大家都上床睡觉了的时候他偏偏把广播打开了。

例题：
—May I smoke here?
—If you , choose a seat in the smoking section.
A. should
B. could
C. may
D. must
【答案选D】由本题语境可知，空白处应表示“非得……；一定要”之意。

情态动词综合真题讲解
1. ---You needn’t do it right now, need you?
---Yes I am afraid I ______ .
A. need
B. needn’t
C. must
D. mustn’t
解析：选C. Yes的意思是：不。

意为：恐怕我必须现在就做。

2.My English-Chinese dictionary has disappeared . Who _____ have taken it?
A. should
B. must
C. could
D. would
解析：选C. could/can have done 用于否定推测和疑问推测。

3. ---The room is so dirty._______ we clean it?
----Of course.
A． Will B. Shall C. Would D. Do
解析：选B. shall 用在疑问句中，常用于第一，三人称，表示征求意见或请求指示。

4. If you have something important to do, you ______ waste any time.
A. needn’t
B. mustn’t
C. may not
D. won’t
解析：选B. 根据句意用mustn’t
5. If you want to borrow a football after school, your student card______ here.
A. has to leave
B. must leave
C. has to be left
D. must be left
解析：选C. have to 表示客观需要，must表示主观需要。

学生证必须放在此是客观需要。

6. “ Did you scold him for his carelessness?”
“Yes, but _____ it”
A. I’d rather not do
B. I’d rather not have done
C. I shouldn’t do
D. I’d better not do
解析：选B. would rather 加完成时表示对完成了的或过去了的事情的态度。

意为：当时是不情愿做的。

7. “ Don’t get near to it . It is too dangerous!”
“_______” .
A. Yes, I won’t
B. No, I don’t
C. No, I can’t
D. No, I won’t
解析：选D. A为错误的表达方式；B和C没有直接回答对方的问候。