Unit 8 第三课时 (Grammar Focus 4c)—单元同步语法精讲精练（作业课件）-【原创新课堂】2022-2023学年九年级英语上册（人教新目标版）河南

原创新课堂 英语九年级上册人教版 第三课时 (Grammar Focus-.4c)-单 元同步语法精讲精练 情态动词表推测 情态动词must,can/could,may/might表示推测时，要根据肯定、否定或疑问 的不同形式选用不同的情态动词。 “情态动词+do sth.”表示对现在事情的推测；“情态动词+be doing sth.”表示 对正在发生的事情的推测；“情态动词+have done sth.”表示对过去或已完成事情 的推测。 eg:They must be in the classroom now.他们现在一定在教室里。 Peter may/might have been hurt in the car accident..彼得可能在车祸中受了 伤。 肯定推测 ①ust用于肯定句，意为“准是，一定”，表示对现在较有把握的推测。 eg:The book must be mine.There is my name on it.这本书一定是我的。它 上面有我的名字。 【注意】mustn't表示“禁止；绝不允许”。 ②may,could,might意为“可能，也许”，表示可能性较小的肯定推测。 eg:He could/might/may be running for exercise.他可能正在跑步锻炼。 ③can用在肯定句中，表示理论上的可能性。 eg:Smoking can cause cancer.吸烟有可能引发癌症。 ·否定推测 ①表否定推测时，can't语气最强，指“不可能”，带有惊讶、怀疑的感情色彩。 eg:The story sounds reasonable,but it can't be true.这个故事听起来合情合 理，但不可能是真的。 ②may not/might not/,could not表示不太有把握的否定推测，意为“可能不（会）是”。 eg:He could/might/may not be at home.'m not sure.他可能不在家，我不确 定。 。疑问句中的推测 疑问句中的推测，常用can或could,意为“可能”。 eg:There is someone outside.Who can/could it be?外面有人，会是谁呢？ 语法精练 一、根据句意，从方框中选择合适的情态动词填空。 1.You fiave worked Hluall da Youcan't be tired. mast 2.Lucyome to visit us tonight,but she isn't very sure yet. 3.-Where are my keys,Mom? -I have no idea.They be in your schoolbag. 4.The girl in the classroom can't --be Maria.She called me from the library just now. mustn't 5.You play football in the street.It's too dangerous. 二、根据汉语意思完成下列句子。 6.这条蓝色围巾不可能是我妈妈的。 The blue scarf can't be my mother's. 7.布朗一家可能在郑州。 The Browns may/might/could be in Zhengzhou. 8.迈克肯定正在他的卧室里写作业。 Mike must be doing homework in his bedroom. 9. 我奶奶可能会为我准备生日蛋糕。 My grandma may/might/could prepare a birthday cake for me. 课时精练 一、根据句意及汉语提示完成下列句子。每空一词。 1.You'd better put on your coat--(外套).lt's very cold.. 2.The science faboratory (实验室)must be kept in good order. 3. Bob and Jim played outside all day without fee( (困倦的) 4.Tom (a lot last night,so he went to see the doctor this coughed morning. outdoors 5.Some girls are playing__ (户外)happily. 二、完形填空。 My neighbor is a doctor.He and his wife are some of the__6__people I have ever met.