课件13张PPT。专题十 情态动词1．常见情态动词的基本用法
情态动词不能单独作谓语，必须和其他动词一起构成谓语，表明说话者对所要表达意思的态度和看法。最重要的是，情态动词没有人称和数的变化，其后必须跟动词原形。常见的情态动词有can, may, must, need, should, will, would等。情态动词考点一【拓展】(1)由need引出的一般疑问句，肯定回答常用must或have to；否定回答常用needn't。eg.
—Need I answer the question？需要我回答这个问题吗？
—Yes, you must/have to./No, you needn't.是的，你必须回答。/不，你不需要。
(2)need作为实义动词，有人称和数的变化，后面可接名词、代词、动名词及带to的动词不定式；可用于肯定句、疑问句和否定句中。eg.
She doesn't need to see the doctor. She just needs a rest.她不需要看医生，她只需要休息一下就好了。2．常见的否定情态动词的用法
3.情态动词表推测的用法谢谢观看！第二部分 专题十
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(A )1.—David, ________you speak French?
—Yes, I can. I have learned it for seven years.
A．can B．may
C．need D．must
(B )2.This is really an important meeting for me. I________miss it.
A．may B．can't
C．must D．needn't
【精析】考查情态动词的否定用法。may“可能，可以”；can't“不能”；must“必须”；needn't“不必”。由句意 “这是一场很重要的会议。我不能错过它。”可知选B。
(A )3.Our government declared that people ________drive after drinking alcohol(酒)．
A．mustn't B．needn't
C．couldn't D．wouldn't
【精析】考查情态动词辨析。mustn't“禁止；不准”；needn't“不必”；couldn't“不可能”；wouldn't“不会”。由句意“政府宣布酒后禁止开车”可知选A。
(D )4.—Mary, do you have any plans for this weekend?
—I'm not sure. I________just stay at home.
A．must B．need
C．can D．may
【精析】考查情态动词表推测的用法。must“一定； 肯定”；need“需要”；can“可能；可以；能够”；may“或许”。由句意“你这周末有什么打算，玛丽？”“我不确定，或许只是待在家里。”可知选D。
(A )5.The little boy feels much better, so you________call a doctor.
A．needn't B．can't
C．shouldn't D．mustn't
【精析】考查情态动词辨析。needn't“不需要”；can't“不可以”；shouldn't“不应该”；mustn't“禁止；不准”。由句意“这个小男孩感到好多了，因此你不需要叫医生了。”可知选A。
(A )6.—Look! The boy at the gate________be Jack. He is always standing there every morning.
—No, it________be him. He is ill and doesn't go to school today.
A．must; can't B．must; mustn't
C．can; can't D．will; won't
【精析】考查情态动词表推测的用法。must“一定，肯定”，可能性最大；can't“不可能”；mustn't“禁止；不准”； can“可能”；will“打算；将要”；won't“将不会”。由句意“看，门口站的那个男孩一定是杰克，他每天早上都站在那儿。”“不，那不能是他，他今天生病了没有来学校。”故选A。
(D )7.—May I go swimming alone this weekend, mom?
—No, you________. It is really dangerous.
A．may B．needn't
C．wouldn't D．may not
【精析】考查情态动词的否定用法。may“可以”；needn't“不需要”；wouldn't“不打算；不会”；may not“不能；不可以”。由句意“妈妈，这周末我可以独自去游泳吗？”“不，不行。那太危险了。”可知选D。
(A )8.I have heard that the sun________experience a period of quiet time in 2030 and the climate on earth will become colder.
A．will B．must
C．can D．should
【精析】考查情态动词辨析。will“将要”；must“必须”；can“能，会”；should“应该”。由时间状语in 2030及and连接并列句时态一致可知此处也应为将来时，故选A。
(B)9.—What's that noise?
—It________be my son playing computer games. He's very naughty.
A．can B．must
C．will D．need
【精析】考查情态动词表推测的用法。can“能”；must“一定”；will“将会”；need“需要”。由语境可知此处是表示肯定推测，故选B。
(B )10.—How's your new English teacher?
—We________ask for a better one. All my classmates love him so much.
A．should B．couldn't
C．mustn't D．can
【精析】考查情态动词辨析。should“应该”； couldn't“不能”；mustn't“禁止”； can“能够”。上句问“你的新英语老师怎么样？”所有的同学都非常喜欢他。可知“我们找不到比这更好的老师了”。故选B。
