modal verbs教师版.doc

用心爱心专心Module4unit2GrammarandusageAtruefriendisthebestpossession.真诚的朋友是最宝贵的财富。Learningaims:Mastertheusageofsomecommonmodalverbs;Knowhowtousethemcorrectly;Developthesenseofcooperation.Step1:读一读：（下划线句中情态动词）NowmanyofuscanspeakEnglishquitewellbutafewyearsagowecouldn’t.Mybrotherisabletodiveunderwaterfor10minutes.Youshouldrespectyourparents.Ihavetofinishtheworkbefore7o’clock.Youmustworkhardtoachieveyourlifegoal.Shallwecarrythebooksforyou?Youneedn’tdothatifyoudon’twantto.Thelittlegirldarenotgooutaloneatnight.Willhepayforme?Step2:学一学：体会下列各情态动词的用法Can/could/beabletoHecanplaybasketballverywell.CanIuseyourpen?Couldyougivemeapieceofpaper?4．Marycan'tbeinParisforIsawherinthetownonlyafewminutesago．用法总结：can表示1.能力2.请求许可could语气更加委婉3.推测/可能性(只用于否定句和疑问句)比较下面两个句子体会can与beableto用法的不同Mybrothercanplaytabletennis.6．Mybrotherisabletodiveunderwaterfor10minutes.表示“能够”之意时Can强调主语本身具有的一种能力;beableto强调在特定情景中努力做成某事.选择：＊Hedidn’tagreewithmeatfirstbutI___wasableto___persuadehim.＊She__could___singwhenshewasyoung.(wasableto;could)二、may/might1.WhatistheweatherlikeinZhuzhou?---Itmaybesunny.2.WhatistheweathergoingtobelikeinGuangZhou?---Itmighthavestrongwind.MayIcomein?Mayyousucceed!用法总结：may/might表示1.推测“也许”might语气更加委婉2.请求允许“可以”3.用于祈使句中表示祝愿（用倒装结构）三、must/haveto1.Youmustwearyourschooluniform.2．Youhaveworkedhardallday.Youmustbetired.3．MybrotherwasveryillsoIhadtocallthedoctorinthemiddleofthenight.用法总结：must表示1.必须2.推测“一定”Haveto表示必须.当表示“必须”时must与haveto的区别是：must表示说话人的主观看法haveto强调客观需要可译为“不得不”。4.特别注意：Youdon’thavetotellhimaboutit.Youmustn’ttellhimaboutit.mustn’t意为“决不可以”“不准”don’thaveto意为“不必”。---MustIfinishmyhomeworkto