动词不定式及其用法温馨提示Grammar动词不定式作主语作宾语afford,agree,appear,arrange,ask,attempt,dare,decide,demand,determine,expect,fail,help,hope,hurry,intend,learn,manage,offer,plan,prepare,pretend,promise，refuse,seem,want,…作表语作定语Itseemsthathehasnopen______.A.towriteB.towritewithC.writingD.writingwith不定式作定语，往往表示将要发生的动作。Ihavealotofworktodo.Themeetingtobeheldtomorrowisveryimportant.作状语结果状语:常与only,enough或too连用。Hestudiedhardonly________theexam(fail).Heisoldenoughtogotoschool.（注意区别与现在分词作状语）Hisparentsdied,_______(leave)himanorphan(孤儿)原因状语:一般用在句尾I’mgladtoseeyou.作宾补2)不带to的不定式作宾补。使役动词make,have,let;感官动词see,watch,observe,hear,listento,notice等后面作宾补省略to。如:Hemadeafaceandmadeeverybodylaugh.他做了一个鬼脸,逗得大家都笑了。注意（notice）观察（observe）三看（see，watch，lookat）二听（hear，listento）一感觉（feel）半帮助（help）To字离开又回来如果上述结构变为被动语态,不定式就由原来不带to的不定式加上to。如:Isawhimgoupstairs.Hewasseentogoupstairs.有人看见他上楼去了。说事拉理口诀唱响动词不定式的时态㈡.进行式(tobedoing)动词不定式的时态动词不定式的时态动词不定式的语态注意注意self-learningcheck1.—Thelightintheofficeisstillon.---Oh,Iforgot.A.turningitoffB.turnitoffC.havingturneditoffD.toturnitoff2.Shecan’thelp_____thehousebecauseshe’sbusymakingacake.A.tocleanB.cleaningC.cleanedD.beingcleaned4.Maryisalwaysthefirststudenttoanswertheteacher’squestionsinclass.A.risingB.toriseC.roseD.risen5.—Mum,whydoyoualwaysaskmetoeataneggeveryday?---_____enoughproteinandnutritionasyouaregrowingup.A.GetB.GettingC.TogetD.Tobegetting6Thepatientwaswarned_______oilyfoodaftertheoperation.A.toeatnotB.eatingnotC.nottoeatD.noteatingchallenge1.Pauldoesn’thavetobemade________.Healwaysworkshard.A.learnB.tolearnC.learnedD.learning高考链接4.–Didthebookgivetheinformationyouneeded?–Yes.But_____it,Ihadtoreadtheentirebook.(2010北京卷)A.tofindB.findC.tofindingD.finding5.Ifthereisalotofwork_____,I'mhappytojustkeeponuntilitisfinished.(2012上海卷)A.todoB.tobedoingC.doneD.doingStepIII.summaryThankYou!