河南省新密一高高三英语语法专项复习 情态动词 课件.ppt

语法专题 情态动词的用法 情态动词的基本用法特点1 情态动词除ought和have外 后面只能接动词原型 2 情态动词没有人称 数的变化 即情态动词第三人称单数不加 s 3 情态动词没有非谓语形式 即没有不定式 分词 等形式 高中阶段都学过哪些情态动词呢 1can could beableto 2may might 3must haveto 4shall should 5will would 6need dare 7oughtto 1can could beableto 1someofuscanusecomputersnow butwecouldn tlastyear 能力 2itwillbesunnyinthedaytime butitcanrainlateronthisevening 客观可能性 3 canigonow yes youcan 请求和允许 4couldyouwaitafewdaysforthememory 请求 51canthisnewsbetrue 2itcan tbeourheadmaster hehasgonetobeijing 表推测 主要用于否定和疑问 beableto能用于各种时态 can could只能表示现在或过去的能力 was wereableto 设法做成某事 相当于managedtodosth succeededindoingsth 1 can与beableto有何区别 1 acomputer thinkforitself itmustbetoldwhattodo a can tb couldn tc maynotd mightnot 2 thefirespreadthroughthehotelveryquicklybuteveryone getout a hadtob wouldc couldd wasableto a d 3 theywill runthismachineontheirowninthreemonths a canb couldc mayd beableto d 2may might 1mayiwatchtvaftersupper yesyoumay no youmustn t 请求许可 2itmaybetrue shemaycometomorrow hemighthavesomefever 推测 3mayyousucceed mayyouhavemanymoredaysashappyasthisone 祝愿 may mightaswell还是 好wemayaswellstaywhereweare 5 couldiborrowyourdictionary yes ofcourseyou a mightb willc cand should6 mightiwatchtvaftersupper yes you a mayb mustc mightd can c a 3must语haveto的用法 1youmustcometoschoolontime youmustn twasteanymoretime 必须 禁止 2musticomebackbeforeten yes youmust no youneedn t don thaveto 3itmustbeourheadteacher youmustbehungryafteralongwalk 推测 4ireallymustgonow ihavetogonow becausemymotherisinhospital 不得不 hemustbereading he youmustdoityourself you hemusthavegoneoverthearticle he itmusthaverainedlastnight it 3 表推测语气的反意疑问句的构成 isn t don t hasn t didn t 另外must还有偏偏一定要的意思whymustyouplaythepianowhileothersaresleeping 7 you returnthebooknow youcankeepittillnextweekifyoulike a can tb mustn tc needn td maynot8 johnny you playwiththeknife you hurtyourself a won t can tb mustn t mayc shouldn t mustd can t shouldn t c b 9 willyoustayforlunch sorry mybrotheriscomingtoseeme a imustn tb ican tc ineedn td iwon t10 mayipickaflowerinthegarden a no youneedn tb not please c no youmustn td no youwon t b c 4shall与should 1用于一 三人称疑问句表示征求对方的意见和向对方请示shallthedriverwait whatshallwedonext 2用于二三人称陈述句表示命令警告 允诺 威胁以及法律条文规定youshallgowithme heshallbepunishedyoushallhavethebookwhenifinishitallthechildrenshallgotoschoolattheageofseven 3表示劝告和建议youshouldstudyhard 4表推测theyshouldhavearrivedbytwoo clock 5用于if条件句表示万一asktomtoringmeupifyoushouldseehim shoudibefreetomorrow iwillcome 6表竟然idon tknowwhyyoushouldbesorudetoyourmother tom sfatherpromised you haveanewcomputerifyoupassthecomingexamination a canb shouldc shalld may c whencanicomeforthephotos ineedthemtomorrowafternoon they bereadyby12 00 a canb shouldc mightd need b yououghttohavehelpedhimwithhisenglish you a won tyoub oughtnotyouc shouldn tyoud wouldn tyou c 5will与would的用法 1表示意志和意愿iwillneverdoitagain theysaidthattheywouldhelpus 2表请求 建议willyoupleasetakeamessageforme wouldyoupleasepasshimthebook 3表功能thismachinewon twork 4表示习惯性动作与usedto有何区别fishwilldiewithoutwater everyevening hewouldsitbythewindow 6need语dare的用法 既可做实意动词又可做情态动词 做情态动词用于否定和疑问句而做实意动词可用于肯定 否定疑问 howdareyousaysuchathing howdareyoutosaysuchathing hedaren ttospeakenglishbeforesuchacrowd didhe hedaren tspeakenglishbeforesuchacrowd darehe she outaloneatnight a darenottogob daresnotgoc doesn tdaretogod doesn tdaresgo c 7oughtto的用法 1表应该与should的区别yououghttotakecareofhim youarehisfather yououghttogethimtoreceivegoodeducation 2表推测heoughttobehomebynow hemustbehomebynow 一情态动词 完成时表对过去的推测1musthavedone 仅用于肯定句 2can t couldn thavedone 用于否定疑问句 3mayhavedone 肯定 否定均可 4mighthavedone 肯定 否定均可 二表虚拟1should could would mighthavedone 三needn thavedonewouldratherhavedonehadbetterhavedone jenny withhimatthattime foriwashavingdinnerwithherinmyhome a can thavebeenb mustn thavebeenc mustbed maybe a theyaredisappointedattheenglishparty theysaythatit betterorganized a hadbeenb hadtobec musthavebeend couldhavebeen d didyouwalkedhomebyyourselflastnight yes idid butithinki a needn tb shouldn tc maynothaved needn thave d 8 we lastnight butwewenttotheconcertinstead a musthavestudiedb mightstudyc shouldhavestudiedd wouldstudy9 therewasplentyoftime she a mustn thavehurriedb couldn thavehurriedc mustn thurryd needn thavehurried10 yesterday janewalkedawayfromth