情态动词表推测的用法PPT课件.ppt

Let slearn 1 1 Mygrandmaisovereighty butshecanreadwithoutglasses 2 Canyouwaitamomentplease 3 Excuseme couleyouhelpmeplease 4 Accidentcanhappentoanydrunkendriver 5 Itcan tbemyfather HeisnowinEngland 表能力 表请求 许可 可能性 Can could 2 May might 1 可能性 Hemaybeverybusynow Hemightbeverybusynow May表许可 Hemaygonow MayIgonow 祈使句 Mayyousucceed Mayyouhaveanicetrip 3 Will would Thatbaglooksheavy I llhelpyouwithit Thanksforlendingmemoney I llpayyoubackonFriday Thisoldmanisstrange Hewillsitforhourswithoutsayinganything WewouldsitaroundGrandpaaftersupper listeningtohisstories Willyoucomethisway please Wouldyouopenthewindow 意志 愿望 决心 习惯 请求 用于第二人称 4 Shall should Shallweputoffthesportmeetinguntilnextweek ShallTomgotherewithmetomorrow Youshallifyoudon tworkharder Heshallhavethebookwheninfinishreadingit 请求征求意见 警告允诺威胁等 5 Must can t 规定 指令Youmusthaveapassportifyouwanttogoabord 主观的命令 禁止Youcangooutwithyourfriendbutyoumustcomebackbefore11atnight Youmustbeill Icanseeitfromyourface Hecan tbeathome Isawhimintheclassroomjustnow 推测 6 Can could 表能力 ability 表请求 允许 request permission 可能性 possibility Can用于肯定 理论上 可能 Can t用于否定句中 主观猜测 May might 表示可能性 might不是may的过去式 may表许可 permission May用于祈使句 表祝愿 Will would 表意愿 Will would表习惯 表请求 Shall和shouldShall的用法 征求意见 第一 三人称 命令 警告等 第二 三人称 Must can tmust 命令 推测 A 规定 指定B 主观的命令 禁止C 猜测 语气肯定 Can t用于否定句 Should表劝告 建议 命令及合理推断 7 情态动词表示推测1 might mayMight 也许 May 可能 Eg Hemightberight 他也许是对的 Hemaynotcometonight 他今晚可能不来 否定 mightnot 否定 maynot 表示主观的推测 一般用于肯定句 8 2020 2 6 9 2 canCan用于主观推测时 常用于否定句 can t不可能 和疑问句 疑问句中也可以用couldCan用于肯定句时 表示一时的 客观的可能性 Eg Canhebeathomenow 他现在在家吗 No hecan tbeathome sinceImethiminthestreetjustnow 不 他不可能在家 因为我刚才才大街上遇到他了 Couldshebechattingontheinternet 她现在可能在网上聊天吗 10 3 Should和oughtto表示根据常规 事理 经验做出的判断 想必 应该 Eg TodayisSunday Ourteachershouldbeathome Thatoughttobeenoughfoodforthefourofus 4 must表主观的推测 一定 语气十分肯定 其否定式为can t 不可能 不用mustn t mustn t表示禁止 不允许 语气十分强硬 Eg Hemustbeintheclassroomnow Youcan thaveknownthetruth Studentsmustn tsmoke 11 一些情态动词后接完成式是对过去情况的肯定或否定的推测或推断 musthavedonesthmayhavedonesthmighthavedonesthcan thavedonesthmaynothavedonesthmightnothavedonesth 12 还有一些情态动词后接完成式表示动作按理应在过去发生 但事实上却没有发生 1 could havedonesth 本可能 本可以做某事 couldn t havedonesth 本不可能 本不可以做某事 Eg Hethoughtaticketwhenhecouldhaveenteredfree Ididn tseeherinthemeetingroomthismorning Shecouldn thavespokenatthemeeting2 should oughtto havedone 本应该做 本应该发生 should oughtto havedone 本应该做 本应该发生Eg Ioughttohavesaidittoherinacalmermood Heshouldn thavebrokentheredlight 13 3 need后接完成式主要用于否定句中 needn t havedone 表示本不必要做某事Eg Youneedn thavewateredtheflowers foritisgoingtorain Isn tthatAnn shusbandoverthere No itbehim I msurehedoesn twearglasses A can tB mustnotC won tD maynot Hehavecompletedhiswork otherwise hewouldn tbeenjoyinghimselfbytheseaside A ShouldB mustC wouldn tD can t 14 Excuseme IsthattherightwaytotheSummerPalace Sorry Iamnotsure Butitbe A MightB willC mustD can Cathrine Ihavecleanedtheroomforyou Thanks Youit Icouldmanageitmyself A needn ttoB needn thavedoneC mustn tdoD shouldn thavedone Hepaidforaseat whenhehaveenteredfree A CouldB wouldC mustD need Toenjoythescenery Irenewouldratherspendlonghoursonthetraintravlbyair A AsB toC thanD while 15 Lucydoesn tmindlendingyouherdictionary She I vealreadyborrowedone A can tB mustn tC needn tD shouldn t Whoisthegirlstandingoverthere Well ifyouknow herna