Grammartoinfinitive(不定式)动词不定式的使用Todolikethatisfoolish.IwanttoseeyouIamtovisityouHehaslotsofworktodo.IstudyhardtoimproveEnglish.Theteacheraskmetoanswerthequestion.主语宾语表语定语状语宾补作主语TolearnEnglishisreallyimportantnowadays.Tobeadoctorismydream.1.学习外语真的很重要。2.做一名医生是我的梦想。Subject动词不定式和不定式短语做主语时，常用it做形式主语，其句型结构为：Itis+形容词或名词（或词组）+不定式短语…这时的形容词常为easy,difficult,hard,good,useful,wrong,right,necessary,impossible,important等。名词或词组常为afact,agreatday,agreatthing,apity等。Tip:作宾语Freddidn’thaveanymoney,sohedecidedtolookforajob.Hepromisednottotellanyoneaboutit.1.Fred没有钱，所以他决定找一份工作。2.他答应不告述任何人这事。ObjectCanyougivesomeexamples?作表语Mytaskistofinishthehomework.Toseeistobelieve.1.我的任务是去完成作业。2.眼见为实。Predicative作定语Doyouhaveanythingtosay?1.你有什么要说的吗?2.Betty是第一个知道这真相的人BettywasthefirsttoknowthetruthAttribute注1:不定式做定语时，表示未做。Ihaveaveryimportantmeetingtoattendtomorrow.注2:动词不定式用作定语时可以放在一些名词的后面。如：attempt,ability,chance,desire,determination,decision,effort,failure,intention,needandopportunity.注3：当名词被序数词修饰时，常用不定式作定语作状语Hespokeloudly(soas/inorder)tobeheard.Iamhappytohearthenews.I’mtootiredtowalkanyfurthertonight.目的状语.原因状语.结果状语Adverbial作宾补Sheaskedmetostaythere.1.她叫我呆在这儿。2.请允许我介绍Mr.White给你们。PleaseallowmetointroduceMr.Whitetoyou.Objectcomplement我听到他在唱流行歌曲Iheardthemsingapopsong.我看到他们踢足球了Wewatchedthemplayfootball.他让我擦玻璃Hemademecleanthewindow.ⅠBareinfinitive（不定式符号to的省略）A.有些动词后面的不定式不带to，“5321”如see,watch,notice,observe（五看）.make,have,let（三让）hear,listento（二听）feel（一感）主动省“to”，被动加“to”注意注意B①介词but，except,表示“除了”后接不定式作宾语时，介词前有行为动词do，不定式省to。②当主语部分有行为动词do，不定式做表语省to。“前有do，后省to””wehadnothingtodobut/exceptwait.WhatIwanttodoisfindsomebooks.注意C.两个或两个以上的不定式由连词and，or，but，ratherthan连接时，第二个不定式符号to开始，往往省略。1.Wouldyouliketogoshoppingorwatchfilms.2.Idecidetoworkratherthanplay.3.Shetoldmetolistencarefullyandworkhard注意作简短回答或避免不必要的重复时，动词不定式常常省去to后面的动词，只保留不定式符号to。A:Wouldyouliketocometomyparty?Marywantedtousemybike,butIaskedhernotto(usemybike).B:Yes,I’dloveto(cometoyourparty).Mary想用我的自行车，但我叫她别用。Ⅱ不定式后动词的省略动词不定式还可以和what,where,how,when,which等连接代词（副词）连用，在句中做主语,宾语和表语，宾补。如：1.如何处理垃圾是个问题。______________________isaproblem.2.Icouldn’tdecide________________.(买哪一个)HowtodealwiththerubbishwhichonetobuyⅢ疑问词+todo时态/语态主动被动一般式todotobedone进行式tobedoing/完成式tohavedonetohavebeendoneⅣ不定式的时态和语态1.Heissaidtogotobeijing.Todo一般表示动作未做3.Heissaidtohavestudiedabroadfor2years.2.Heissaidtobestudyingabroad.Tohavedone表示动作已经发生（发生在谓语动词之前）Tobedoing所表示的动作正在进行。practise当堂巩固Practisemakesperfect1.—Andyworkshard.---sohedoes,heisoftenseen_____afterwork.A.playingB.toplayC.tobeplayedD.tobeplaying2.I’mthirsty.Wouldyoupleasegivemesomething_____.A.drunkB.todrinkC.tobedrunkD.drinking3.---DoyouplantogotoBeijing?---Yes,Iplan___.A.\C.soD.thatB.to4.Hegav...
