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情态动词can,could,may和might讲解和练习

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核心提示:情态动词can,could,may和might讲解和练习1.can和could的用法(1)表示“能力,能够”。—Noonecan_be_compared_withYaoMinginplayingb
情态动词can,could,may和might讲解和练习
1.can 和could的用法 
(1)表示“能力,能够”。
—No one can_be_compared_with Yao Ming in playing basketball.
——在打篮球方面,无人能与姚明相媲美。
—Oh,you are really his big fan.
——你真是姚明的铁杆粉丝。
(2)表示“许可”,此时can可以和may换用。
You can (may)  go home now.
你现在可以回家了。
(3)表示惊讶,常用在否定句和疑问句中。
How could you do such a silly thing?
你怎么能做那样的蠢事呢?
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2.may和might的用法
(1)may和might表示“请求许可”。
—May I take the book out?
——我能将书带出去吗?
—I'm afraid not.
——恐怕不行。
(2)“may/might as well+动词原形”意为“最好;不妨”。
If you think the price of beef is too high,you may_as_well_buy some pork.It depends on you.
如果你认为牛肉太贵的话,你不妨买些猪肉。你自己决定。

3.must的用法
(1)表示必要性,意为“必须”。
—Shall I inform him of the change of the schedule right now?
——我现在通知他日程表的变动吗?
—I_am_afraid_you_must,in case he comes late for the meeting.
——恐怕你必须通知他,以免他开会迟到。
(2)表示禁止(用于否定句)。
The new law states that people mustn't_drive after drinking alcohol.
新颁布的法律禁止人们酒后驾车。
(3)表示“偏偏,偏要”。
If you must go,at least wait until the storm is over.
如果你非要走的话,至少等到暴风雨结束。

用适当的情态动词填空
1.—Nowadays children have more freedom.
—I agree.They ________ do what they like.
2.—Please don't tell anybody.
—I ________.I promise.
3.When I lived with my roommates in the university,we________ often talk into the night.
4.—Where did you get The Frog written by Mo Yan?
—I picked it up from a bookshop online if you ________ know.
5.Students ________ remain in their seats until all the papers have been collected.
6.I know that it will be difficult to pick him out in such a crowd,but if you ________ happen to see him,give him this packet.
7.—Why does Thomas speak through every discussion but never listen to the others?
—That's what he ________ do.We used to hate that,but are used to it now.
8.We can't use it to tie the goods because it ________ be broken at the weakest position.
9.—May I smoke here?
—If you ________,choose a seat in the smoking section.
10.—Can you keep a secret?
—You ________ worry—I'm not going to mention it to anyone.
答案 1.can 2.won't 3.would 4.must 5.shall  6.should 7.will 8.may 9.must 10.needn't
 
 
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