新人教版高中必修三第1单元情态动词语法课件.pptVIP

热身导入 Can you list some modal verbs that you remembered? ;情态动词的语法特征;自主学习 Read 8 and learn “can could be able to” ;归纳总结;例1：Could I borrow your dictionary? Yes, of course you____. A. might B. will  C. can D. should;归纳总结;归纳总结;归纳总结; shall和should的用法;— The room is so dirty. _____ we clean it? — Of course. (2003北京春) A. Will B. Shall C. Would D. Do“The interest ______be divided into five parts, according to the agreement made by both sides.　A. may B. should C. must D. shall 上述两题均考查 shall的含义，当shall 用于一、三人称疑问句中时，表示征求对方意见；用于二、三人称陈述句中，表示说话人给对方的命令、警告、允诺或威胁等。 ;should;2. 表示否定的情态动词的用法: 部分情态动词的否定式是情态动词中的考点 之一。 ;Must/can`t;例1：Must I start at once? No, you____. A. needn’t B. mustn’t  C. can’t D. won’t;反馈练习：workbook(p9);Homework;;判断正误: ;Nobody need to be afraid of catching the disease. Nobody need be afraid of catching the disease.;need 的被动含义：need，want, require, worth (adj.)后面接doing 也可表示被动 need doing =need to be done;表示推测的用法can, could, may, might, must 皆可表示推测;不同的“肯定”程度可按下列层次排列： He is at home. (事实) He must be at home.（非常肯定的推断） He could be at home.（很可能） He ought to be at home.（很可能） He may be at home.（仅仅可能而已） He might be at home.（或许, 非常不确定） He might not be at home.（也许不在家） He may not be at home. （比might可能） He couldn’t be at home.（很可能不在家） He can’t be at home.（一定不在家） He isnt at home.（事实） ;二、情态动词+have done表示对过去情况的推测;析：选C。分析语境可知，口头上告知Sally如何去那里是不够的，所以我本应书面告知，却有没书面告知之，显得应使用should /ought to have written表示遗憾之情。;（二）may/might have done可能已做 / must have done 一定已做/can’t have done不可能做;（三）could have done指本来能做而实际未做，表达遗憾的感情色彩 ;He must be reading, ____ he? You must do it yourself, ____ you? He must have gone over the article, ______he? It must have rained last night, _____ it?