(
课件网) Teenagers should be allowed to choose their own clothes 重点语法精讲 Unit 7 CONTENTS 情态动词被动语态 01 情态动词表义务 02 表达同意和不同意的常考点 03 情态动词被动语态 Tables can be made of stones. 桌子可由石头制造。 肯定句结构：情态动词+be+过去分词 I believe that something can not be bought by money. 我相信有些东西是用钱买不到的。 否定句结构：情态动词+not+be+过去分词 情态动词被动语态 Can tables be made of stones 桌子能用石头制造吗？ 一般疑问句结构：情态动词+主语+be+过去分词+... These young trees should be watered every day.（对划线部分提问） 特殊疑问句结构：疑问词+情态动词（+主语）+be+及物动词的过去分词（+by+宾语）？ How often should these young trees be watered 情态动词被动语态的练习 1.选词填空。 To make our city more beautiful, rubbish _____ into the water. (mustn't be thrown/mustn't throw) 2.按要求改写句子。 Everyone can hear the wonderful speech in the hall.（改为被动语态） The wonderful speech can _____ _____ by everyone in the hall. 4.按要求改写句子。 People should take good care of the aged everywhere.（改为被动语态） The aged should _____ _____ good care _____ everywhere. 3.按要求改写句子。 We ought to keep the room clean. （改为被动语态） The room _____ _____ _____ kept clean. mustn't be thrown be heard ought to be be taken of 情态动词表义务（must/mustn’t/should/shouldn’t/ought to/ought not to) All passengers must wear seat belts.所有乘客必须系安全带。 1. must可表义务，常表示“必须”。 -Must we wear seat belts 我们必须系安全带吗？ -Yes, you must.是的，必须。 -No, you needn't. / No, you don't have to.不，不必。 2.关于must 的简短回答：否定回答时不用mustn't。而needn’t/don’t have to We mustn't buy fur products.我们不应当购买皮草制品。 3.mustn't 也可表义务，表示“禁止”，也可意译为“不应当；不许”。 情态动词表义务（must/mustn’t/should/shouldn’t/ought to/ought not to) You should /ought to apologize to him. You should not (=shouldn’t) drive after drinking. You ought not to drive after drinking. should为情态动词，意为“应该；应当”，后接动词原形，无人称和数的变化，常可与ought to互换。可用于表达义务或责任，否定形式shouldn't（should not），常可与oughtn't to（ought not to）互换，意为“不应当；不应该”。 情态动词表义务（must/mustn’t/should/shouldn’t/ought to/ought not to) 1.选择适当的单词填空。 We _____ drive after drinking wine. (must/mustn't) mustn't 2.选词填空。 They _____ treat their mother in this disrespectful (不尊重的) way. (should/shouldn't) shouldn't 3.根据句子意思填入恰当的情态动词。 By law, seat belts _____ be worn by all passengers. must/should 4.根据中文意思补全句子。 你的穿着应该整洁漂亮，而且必须非常合身。 What you wear _____ be stylish and clean, and _____ definitely fit well. should must 表达同意和不同意的常考点 Shall we go to London for the summer hoilday .It’s one of the most beautiful cities. A.Sounds great B.I don’t like it C.You are kidding D.You’re welcome A 表达个人观点，我们可以用以下句式或短语： 1. I (don’t) think/suppose/believe/hope... 2. in m ... ...
