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1、中考词法高频考点(六)情态动词EverydayEnglishYoumustn’tsmoke.•Youknowsomebirdsarenotmeanttobecaged,theirfeathersarejbjusttoobriighht.You’dbetterhavearest.•你知道,有些鸟儿是注定不会被关在牢笼里的,它们的每一片羽毛都闪耀着自由的光辉。•《ShawshankRedemption肖申克的救赎》Weshouldwaitinline.情态动词情态动词的基本用法定义表示说话人的态度和看法。can原则◆不能单独使用,后接动词原形,构成谓语。含义
2、1:能,会(bblt)(=beableto)否定:can’t◆没有人称和数的变化。过去式:could◆否定在后直接加not。注意:Yoummusttsoe.ustustn’tn’tsmoke.can只有一般现在和一般过去式could常见的情态动词有:beableto则有更多时态can,may,must,need,should,shall,hadbetter……You’dbetterhavearest.’dbetterIcanswimIcanswim.Weshouldwaitinline.shouldIcoulddothiswhenIwasyoung.II
3、ll’llbeabletobecomeagoodswimmerinthefuturebeabletobecomeagoodswimmerinthefuture.1canmay含义2:可以(表许可)含义:可以(表许可)口语中可与may互换否定:can’t/mustn’t(不可以、禁止)疑问句中可用could代替,表委婉语气。过去式:might(一般疑问句中表委婉语气)CanIcomein?=_____Icomein?May---May/MightIsmokehere?---CouldIplaywithyoutomorrow?---Noyoucan’t/mu
4、stn’tNo,youcan’t/mustn’t.---Yes,you____./No,I’mafraidnot.canmustneed含义:必须1.作情态动词(表需要)否定:needn’t不必要;mustn’t不准needn’tdo/Needsb.do…?(否定句和一般疑问句must&haveto:中)must:表主观看法,只有一般现在时无三单haveto:强调客观需要(“不得不”),有更多时态。---NeedIloseweight?We______obeytheclassroomrules.must---No,youneedn’tdoit,becau
5、seyouaretoothin.You_______pmustn’tspithere.You______takeanumbrella.It’ssunny.needn’tI_______hadtoworkwhenIwasyoung.2needshould2.作实意动词(表需要)含义:应该needtodosth.(肯定句中)need有人称和数以及时态变化否定:shouldn’tWeshouldlookaftertheoldpppeople.Weneed________ourenvironment.(protect)Weshouldn’tfightwithot
6、hers.Everyone___________somethingtoprotectourearth.(do)shallhadbetter1.作助动词,用于一般将来时的第一人称后,相当于will含义:最好2.用于第一人称的疑问句中,表征求意见。否定:hadbetternotdosth.3.用于第二/三人称,表许诺、命令、警告、威胁等。Youhadbetterhavearest.IshallflytoShanghainextweekIshallflytoShanghainextweek.Youhadbetternotgoonworking.Shallweg
7、oshoppingtogether?Youshallfailifyoudon’tworkhardYoushallfailifyoudon’tworkhard.3情态动词特殊用法情态动词的表建议句型一、情态动词表推测1.Wouldyouliketodo1.Wouldyouliketodosth.?2.Wouldyoumind(not)doingsth.?3.Wouldyouplease(not)dosth.HemustbeCurnane!Wouldyouliketoflyakitewithme?Wouldyouliketoflyakitewithme?He
8、mightbethinking.Wouldyoumindnotsmokinghe