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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？ 英语选修七课文翻译 小e英语 必修三英语单词音频 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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