情态动词musthaveto.ppt
《情态动词musthaveto.ppt》由会员分享,可在线阅读,更多相关《情态动词musthaveto.ppt(12页珍藏版)》请在冰点文库上搜索。
,基本形式,MustHaveto,基本意义,特殊用法,表示推测,巩固练习,Musthaveto肯定式mustdohave/has/hadtodo否定式mustnotdodont/doesnt/didnthavetodoneednt/donthaveto疑问式Must+sb.+do?
Do/does/did+sb.+haveto?
由must引起的疑问句,肯定回答要用must或haveto,否定回答要用neednt或donthaveto,意思是“不必”.MustIfinishthetaskrightnow?
Yes,youmust./Yes,youhaveto.No,youneednt./No,youdonthaveto.Mustnt表示禁止,意思是“不准”,Must和haveto的区别:
Imustlearnanotherlanguage.Ihavetolearnanotherlanguage.Tommustshaveeverymorning.Tomhastoshaveeverymorning.妈妈不在家,因此我不得不照看商店。
Motherisout,soIhavetolookaftertheshop.我要留下来照看店。
Imustlookaftertheshop.你留下看店。
Youmustlookaftertheshop.,(主观愿望:
Iwantto),(客观需要:
我跳槽去了法资企业。
),(军人服从命令),(他长着一脸大黑胡子),必须,不得不,Must表示猜测,常用于肯定句中,意思为“一定是,必然”。
注意must表示推断或猜测的几种情况:
你姐姐一定是这家医院的医生。
(表现在的猜测)Yoursistermustbeadoctorinthishospital.他此刻一定正在阅览室读报。
(表正在进行的猜测)Hemustbereadingnewspapersinthereadingroomnow.昨晚一定下雨了,因为地面上是湿的。
(表过去的猜测)Itmusthaverainedlastnight,forthegroundiswet.Haveto不能表推测,must+bedoing,must+do,must+havedone,Mike,you_playwithfire.You_burnyourself.A.wont;cantB.mustnt;mayC.donthaveto;mustD.havegotto;shouldnt2.You_seethedoctor,Joe.Youdontlookverywell.A.mustB.shallC.mayD.can3.MustIcleanthewindownow?
No,you_.A.mustntB.needntC.cantD.maynot,Consolidation,A,B,B,4.Jacksill,sothey_changetheirplans.A.mustB.needC.havegottoD.might5.-Harryhasbeenreadingallday.He_betired.A.shouldB.hasgottoC.hastoD.must,C,D,2.Ivetakensomeoneelsesgreensweaterbymistake.-It_Harrys.Healwayswearsgreen.A.mightbeB.willbeC.mustbeD.hastobe2004天津1.Whoisthegirlstandingoverthere?
-Well,ifyou_know,hernameisMabel.A.mayB.canC.mustD.shall,A,C,Must表“偏要,偏偏”:
AfterIgavehimadvice,hemustdotheopposite.Ifyoumustleave,tellmeandIwillletyougo.Mustyoutroublemenow?
Youmusthandinyourhomeworkontime.,Hemusthavedonesomethingwrong.,反意疑问形式当陈述部分含有情态动词must时,我们便要分析一下must的含义。
1.如果must作“一定;要;必须”讲,反意疑问句须用neednt:
Hemustworkhardatphysics,neednthe?
2.而当must作推测意义“一定是;必定”讲时,反意疑问句则需根据must后的动词原形,选用相应的形式。
Tommustbeathome,isnthe?
Tommusthavefinishedhishomework,hasnthe?
Notes:
must用作名词,必须有的/做的东西Warmclothesareamustinthemountains.MustIlistentotheteacherinclass?
Yup,youmust.Thatsamust.,