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1、Unit1Module4GrammarandusageTo-infinitiveandVerb-ingformasanounPart1To-infinitive1.todoasasubjectThecatsaid,“Totakerollercoasteristerrible”.不定式短語作主語時(shí)，可以直接放在句首，但在很多情況下，尤其是在疑問句和感嘆句中，往往放在謂語之后，而用先行代詞it作形式主語。Thecatsaid,“It’sterribletotakerollercoaster.”Howlongdidittakeyoutotakerollercoaste
2、r?Howterribleitistotakerollercoaster!過山車.wmv不定式作主語常見句型：a)Itis+adj.(easy,important,difficult…)+不定式b)Itis+n.(apity,apleasure,one’sduty,ashame…)+不定式c)Ittakes/needs/requires+sometime(hours,months,days,patience…)+不定式Itrequirespatiencetobeagoodteacher.It’smydutytoteachyouhowtobeastudentofo
3、urSchool.2.todoasapredictiveOurmostimportanttasknowistomakeaplan.當(dāng)句子的主語是aim,idea,policy,question,suggestion,wish,task,duty,job,purpose等或者主語是what引導(dǎo)的名詞性從句時(shí)，后面可以用不定式做表語，用以說明主語所包含內(nèi)容。注：作表語的不定式都帶to，但當(dāng)主語部分有實(shí)義動(dòng)詞do時(shí)，to可以省略。Nowtheonlythingwecandoiswait.3.todoasanobjectThecatsaid“Remembernottot
4、akeitnexttime!”(Tips:不定式否定為notto)a)可以直接用不定式作賓語的動(dòng)詞很多，如agree,afford,tend,ask,decide,determine,expect,fail,hope,learn,intend,manage,offer,plan,promise,refuse,want,wish天津卷12題：Idon’twant_____likeI’mspeakingillofanybody,butthemanager’splanisunfair.A.tosoundB.tobesoundedC.soundingD.tohaveso
5、unded當(dāng)不定式短語比賓補(bǔ)長(zhǎng)時(shí)，往往將不定式放到賓補(bǔ)后，而用先行代詞it作形式賓語，常用動(dòng)詞有feel,think,find,believe,consider,make等。Thecatfeltitterribletotakerollercoaster.b)只有少數(shù)介詞如but,except等后面可以跟不定式作賓語。一般情況下作介詞賓語的不定式都帶to，但如果but或except所在句子里的謂語動(dòng)詞含有do,does,did時(shí)，通常省略to。Wehavenochoicebuttowait.Wecandonothingbutwait.4.todoasanobjec
6、tcomplementYoushouldgetthemtohelpyou.(Theywillhelpyou.)Theybelievedhimtobehonest.(Hewashonest.)(常用謂語動(dòng)詞有:get,ask,force,order,tell,invite,allow,wish,want,like,expect,advise,beg等。)但在謂語動(dòng)詞believe,find,think,feel,consider,suppose,imagine,prove等后面跟tobe…作賓補(bǔ),不跟todo…Thebossmadeherworklonghours
7、.主語謂語賓語賓補(bǔ)She主語wasmade謂語towork主補(bǔ)longhours(byherboss).全國卷(I)No.18Whilewatchingtelevision,______.A.ThedoorbellrangB.ThedoorbellringsC.WeheardthedoorbellringD.Weheardthedoorbellrings2005福建卷No.23IfanyonehappenstodropinwhileI’mout,_____himorherleaveamessage.A.haveB.getC.askD.tellTips:有些動(dòng)詞后
8、面須接不帶to的不定式做
