Explanation1.can的用法（１）表邀请。若接受邀请，回答为：OK./Allright./Sure./Ofcourse./Certainly./Yes(Sure),I’dlove(like)to.若不接受邀请，回答为：Sorry,Ｉcan’t.(+原因)eg.Canyoucometotheparty?Yes/Sure,I’dlove/liketo.Sorry,Ican’t.Ihavetohelpmyparents.其他表邀请的句型:1)Could/Will/Wouldyoucometotheparty?2)Wouldyoulike/lovetocometotheparty?3)Ihopeyoucometotheparty.4)Pleasecometotheparty.5)How/Whataboutcomingtotheparty?（２）表能力“能，会”否定句can’t不能eg.Hecanswim,butIcan’t.Howlongcanyoustayunderwater?（３）在否定句，疑问句中表示“不可能”或“一定不”eg.Canhecome?No,hecan’tcome.（他会来吗？不，他不能来．）2.情态动词“haveto”与其他的情态动词如：“can”,“may”“must”和“should”不同。（1）这4个情态动词没有人称和数的变化,而haveto有。它的第三人称单数为“hasto”,过去时为hadto,如：2.haveto强调客观上需要做某事，即表示外界条件的需要不得不做某事，含有“客观所迫”的意味，它有人称和数的变化，可用于多种时态中，否定式为“不必”。•must强调说话者主观上认为必须做某事，含有“主观判断”的意味，它的否定式意为“禁止，不允许”。•eg.Ifonegetsill,he’llhavetoseeadoctor.•Shehastogotoschoolbybus.•Wemustgotoschoolontime.•---MustIfinishthehomeworknow?•---Yes,youmust./No,youneedn’t(don’thaveto).•Youmustn’tplayfootballintheclassroom.填空1.--_______youcometomyparty?--_______,I’dloveto.2.--_______yougotothemovies?--I’msorry,I_______.3.--_______yougotothebasketballgame?--No,I______.I’mplayingsoccer.4.--______yougototheconcert?--Great!I’d___________.5.--_______yougotothemallthisweek?--Sorry,I_______.CanYesCancan’tCancan’tCanlovetoCancan’t单项选择1.Ihave_____homeworktodo.A.toomanyB.toomuchC.muchtooD.afew2.He___stayathome,becausehismotherwasill.A.hastoB.havetoC.hadD.hadto3.Iwenttothemountain_____.A.nextweekB.thedayaftertomorrowC.yesterdayD.tomorrowBDC4.____Fridaymorning,Iliketogotothemovie___friends.A.In,onB.On,withC.On,andD.At,with5.Wouldyouplease____me____thehousework?A.help,inB.tohelp,withC.help,doingD.help,doBD6.Areyou___footballthisweekend?A.playingB.playC.playaD.Plays7.Ihavetogotomyguitarlesson____19:00___20:00__theevening.A.from,to,onB.in,at,onC.from,to,inD.at,at,onAC
