专题五情态动词和虚拟语气一、表能力•(1)I’mstarving.I__________eat2bowlsofricenow.•(2)Ifyouhaveagoodsleep,you____________workoutthisproblemtomorrow.(将来的能力）•(3)Thefirespreadveryquicklybuteveryone______________getout.(过去有具体的能力；成功的做了某事）canwillbeabletowasableto二、表推测（可能性）•1.表客观的、理论上的可能性(肯定句）•(1)Accidentscanhappenonsuchrainydays.•(2)Heisanicepersoningeneral,buthecanberatherdifficult.•Compare:Wemaygotothecinematonight,butwearenotsureyet.实际可能性不用can二、表推测（可能性）•2.表具体事情发生的可能性•must(肯定句）•should/oughtto(不用于问句)•can(否定句&疑问句)•could•may(不用于问句)•might(不用于问句)•(1)Mydrycleaningshouldbereadythisafternoon.•(2)Canthisbedonebyhim?•(3)Hemusthavelefttown.Ihaven’tseenhimforawhile.肯定句否定句疑问句can/couldcanmust三、表示请求、允许、允诺•(1)Shall/May/Might/Can/CouldI/we…?•ShallIpickthechildrenupfromschooltoday?•(2)Shallhe/she/they…?•Whenshallmyfatherbeabletoleavehospital?•(3)Would/willyou…?•Wouldyoudomeafavor?•(4)Could/Might/would/should…?(Toshowpoliteness)•CouldIuseyourbiketomorrowmorning?Yes,youcan.•(5)shall与第二、三人称用于陈述句，表示说话者的命令、警告或威胁;当宣布法律规定时，也用shall•--Youshallleavetheroomatonce,andhealsoshall!•---Ithasbeenannouncedthatcandidatesshallremainintheirseatsuntilallthepapershavebeencollected.四、表必要性•1.must/havetomustn’t/don’thaveto•3.needtodo/needdodon’tneedtodo/needn’tdoCompare:needn’thavedoneVSdidn’thavetodo/didn’tneedtodoYouneedn’thaveworked(work)thatlatelastnight.Itwasharmfultoyourhealth.-Didyouworkverylatelastnight?-No,Ididn’t.Ididn’tneedtowork(work)verylate.•4.should/oughttodo(havedone)五、宁愿做•1.wouldratherdo•2.wouldratherdosththandosth•3.woulddosthratherthandosth•4.wouldrathersb.didsth•1.prefertodo•2.prefertodoratherthando•3.preferdoingtodoing六、情态动词/hadbetter/wouldrather/wouldliketo+havedoneP57•1.musthavedone•2.can/couldhavedone;can’t/couldn’thavedone•3.may/mighthavedone•4.should/oughttohavedone;shouldn’t/oughtnottohavedone•5.needn’thavedone•6.hadbetter/wouldrather/wouldliketo+havedone•(1)Youhadbetternothavescoldedher.•(2)Iwouldlovetohavegonetothepartylastnight,butIhadtoworkextrahourstofinishareport.七、情态动词的其他用法•1.can’tbutdo/can’tchoosebutdo（不得不、只好）•Ican’tbutagreetohisidea.•2.maywell(完全能，很可能）•(1)Herappearancehaschangedsomuchthatyoumaywellnotrecognizeher.•3.mayaswell（最好）•(1)Youmayaswelldoitatonce.•4.cannot(never)+adj/adv.enough•cannot(never)too+adj/adv•(1)Youcanneverbecarefulenoughwhendealingwithnumbers.(Youcannotbetoocareful…)•5.may表示祝愿•Mayyousucceed!七、情态动词的其他用法•6.should竟然,竟会•(1)HowshouldIknow?•(2)Whyshouldyoubesolatetoday?•7.must偏要、非要•(1)Mustyoumakesomuchnoise?七、情态动词的其他用法•8.need和dare•daredo/darenotdo•dareddo/darednotdo•dare(to)do•dared(to)do•doesn’t/didn’t/…dare(to)do•(1)Everyoneintheofficecomplainsthathesmellsawful,butnobodydares(to)mentionittohim.•(2)Hedidn’tdare(to)doit.•(3)Hedarednotdoit.虚拟语气•If+did…should/would/could/mightdo•If+haddone…should/would/could/might•havedone•If+did………should/would/could/mightdo•+weretodo+shoulddo虚拟语气•If•1.Ifhe________(be)ourboss,we___________________________(stay)till9o’clockeveryday.•2.Ifyou__________(take)myadvice,youwouldnothave...
