八年级英语上册Module11Wayoflife模块同步语法精讲精练课件新版外研版 10页

Module 11　Way of life 模块同步语法精讲精练 情态动词 must ， can ， need 与 had better ► must 的用法 ① must 没有人称和数的变化，后接动词原形，表示义务或必要性时，意为 “ 应该，必须 ” 。 must 引导的一般疑问句肯定回答用 must ，否定回答用 needn't 或 don't/doesn't/didn't have to ，不能用 mustn't 。 ② mustn't 用在否定句中，意为 “ 禁止 ” 。 【 拓展辨析 】must 与 have to ①must 和 have to 都表示 “ 必须 ” ，但 must 强调说话人的主观看法，而 have to 强调客观情况迫使某人不得不做某事。 eg ： You must study hard. 你必须努力学习。 He had to look after his mother.She was ill. 他妈妈生病了，他不得不照顾她。 ② have to 要随着人称和时态的变化而变化。 ► can 的用法 ① can 表示一种能力，意为 “ 能，会，行 ” ，其过去式是 could 。 ②表示请求、许可，意为 “ 可以 ” ，相当于 may 。 ► need 的用法 ① need 作情态动词无人称或数的变化，后接动词原形，多用于否定句和疑问句中。 eg ： You needn't worry. 你不必担心。 ②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 。 ③ need 作行为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。 ► had better 的用法 had better“ 最好 ” ，用于表示对别人的劝告、建议或表示一种愿望。其用法有以下几点： ① had better 后跟动词原形 ( 即不带 to 的不定式 ) ，构成 had better do sth. 句型。 eg ： You'd better go to hospital at once. 你最好立即去医院看病。 ② had better 的否定形式是将否定副词 not 直接放在 had better 的后面。 一、单项选择。 1 ． — Can we run across the road now? —No ， we ________ ． We have to wait until the light turns green. A ． needn't 　 B ． mustn't 　 C ． couldn't 　 D ． shouldn't 2 ． —Must I go to medical school and be a doctor like you ， Dad? —No ， you _______ ， son.You're free to make your own decision. A ． can't B ． mustn't C ． shouldn't D ． needn't B D 3 ． —________you sing an English song? —Yes ， I can. A ． Can B ． May C ． Must D ． Need 4 ． —Oh ， I have a terrible toothache ( 牙疼 ). —You'd better _______see a dentist and have your bad teeth pulled out. A ． to go to B ． going to C ． goes to D ． go to A D 5 ． —Can I wear the dress to school ， Mum? —No ， you can't.You ______wear the school clothes ， or your teacher will be angry. A ． might B ． must C ． needs D ． can B 二、用 can ， must ， need ， had better 的适当形式填空。 6 ． Children _________play in the street. 7 ． —May I smoke here ， please? —I am afraid you _________ ． 8 ． —________I finish my homework now? —No ， you needn't. 9 ． You look tired.You_______________ lie in bed and have a good rest. 10 ． I'm sorry but we __________come to your party next Saturday. mustn't can't Must had_better/can can't 11 ． You ___________come to the meeting if you're too busy. 12 ． We ____________________sit for a long time.It is not good for health. 13 ． —May I have a word with you? —No ， you ________ ． I'm busy today. 14 ． —________you play chess ， Tony? —Yes ， I can. needn't had_better_not/can't can't Can