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1.Jimplans______morefruitandvegetableseveryday.2.Afterdinner,welike_______TVandchatthere.3.Ilove______thereandlookoutatthebeachandthesea.4.Lucywants______sickpeople.5.Istarted________theviolinattheageofsix.toeattowatchtosittohelptoplaysitplayeatwatchhelpPleasegoontolookatthesentencesbelow.Payattentiontothecoloredwords.1.KittyispreparingtogooutnextSunday.2.KittyplanstotakeLindaout.3.Lindawantedtovisitthepark.4.Sandyagreestogowiththem.5.Milliedecidedtostayathome.什么是动词不定式(‘to-infinitives’)？当句子中已经有谓语动词，而我们又要表达不止一个动作概念时，其余的动词可以使用非谓语形式表达。动词不定式就是动词的一种非谓语形式，其肯定形式是“to+动词原形”（有时可以不带to，其否定形式是“notto+动词原形”。无人称、数和时态的变化。Verbs+to-infinitivesagreechoosedecidehopelearnplanpreparewantlikestartbeginfailwishtryrememberforgetWeoftenuseto-infinitivesaftertheseverbs.+to-infinitives作宾语Fillintheblankswiththecorrectformsoftheverbsinbrackets.1.Ioftengotothemarket__________(watch)theflowers.2.Weshouldmakelaws___________(prevent)peoplekillingbears.3.Jimwillgotothepark___________(fly)kites.4.Shewillgotothesupermarket___________(buy)somebread.5.Hecametomyhome____________(play)chesswithmejustnow.6.Weshouldact___________（protect)wildanimals.towatchtopreventtoflytobuytoplaytoprotectUsingto-infinitivesforpurpose动词不定式作目的状语。Usingto-infinitivesforpurposeWecanuseto-infinitivestoexpresspurpose.(表目的)作目的状语。e.g.Ioftengotothemarkettowatchthebirds.NowtheChinesegovernmenthasmadelawstopreventallthesethings.1PeoplegotoZhalong__atotakephotosofthebirds.2Theyshouldreadabout__btostudythethebirdsfirstbirdsinthewetlands.3MostPeopletakea__ctowatchthecamerabirds.4TheBirdwtching__dtolearnmoreSocietygoesaboutthem.adbcAmyisthinkingaboutthethingspeopledoinZhalongNatureReserve.Matchthefirstpartsofthesentencesontheleftwiththesecondpartsontheright.Writethecorrectlettersintheblanks.Wecanalsouseinordertotoexpresspurpose.Thisismoreformalthanto-infinitives.(表达更正式，更清楚)其否定式是inordernottodosthe.g.1.Somepeoplewanttomakethewetlandssmallerinordertohavemorespaceforfarmsandbuildings.2.Takeanotebookwithyouinordertowritedownwhatyousee.3.Takeanotebookwithyouinordernottoforgettheimportantthings.1.PeoplegotoZhalong________(watch)thebirds.2.PeoplegotoZhalonginorder________(watch)thebirds.3.Manypeopletakeacamera________(take)photos.4.Manypeopletakeacamerainorder_______(take)photos.5.Hewrotedownmynameinorder__________(notforget)me.6.Shedoesherhomeworkcarefullyinorder__________(notmake)mistakes.towatchtowatchtotaketotakenottoforgetnottomake注意：由inorderto引导的目的状语，既可以置于句尾，也可以置于句首。e.g.Theystartedearlyinordertogetthereintime.Inordertogetthereintime,theystartedearly.为了及时赶到那里，他们很早就出发了。Usingverbs+objects+to-infinitivesWecanusesomeverbswithobjectsandto-infinitives.(动词不定式在句中作宾语补足语)e.g.Wearenowinvitingthemtohelpus.Weneedmorepeopletocountanddescribethebirds.Weaddnotbeforeto-infinitivestoexpressanegativemeaning.e.g.Weaskpeoplenottocatchbirdsforanyreason.Hetoldmenottomakemuchnoise.常跟带to的动词不定式作宾语补足语的动词有：ask,tell,order,invite,get,allow,wish,want,encourage,advise,warn,wouldlike,need,等。动词不定式作宾语补足语，有带to和不带to的两种形式。e.g.1.Thepolicemantoldtheboysnottoswimintheriver.2.Theteacheraskedthestudentstofinishthehomeworkontime.3.MrWuadvisedustoreadbooksaloud.makeorlet+object+infinitivewithouttoe.g.Maxtellsfunnyjokesandoftenmakesmelaugh.MrWuagreedtoletmejointheirschooltrip.常跟不带to的动词不定式作宾语补足语的动词有：感官动词hear,feel,see,watch,notice等；使役动词let,make和have。see,find,watch,feel,noticeorhear+object+infinitivewithouttoe.g.1.Shesawababypandadrinkhermother’smilk.2.MillieandAmyheardsomeonesinginthepark.3.Healwayswatchthemplayfootball.注意：Shesawaboyplayingfootballonthegroundatthistimeyesterday.表示动作正在发生。动词help后面的动词不定式可带to,也可不带to。help+object+infinitivewithorwithouttoe.g.Thiswillhelppeople(to)understandtheimportanceofthewetlands.Sheoftenhelpsme(to)dothehousework.TheClass1,Grade8studentswenttoZhalongNatureReserve.Sandyiswritingabouttheirtrip.Helphercompletethesentenceswiththecorrectformsoftheverbsinbrackets.1.MrWu_____us________apairofcomfortableshoesbecausewewouldhavetowalkalongway.(ask/wear)2.We_____somebirds_____inthetrees.(hear/sing)3.MrWu_____us_________thebirdscarefully.(tell/watch)4.Healso__________us__________thebirds.(encourage/describe)5.He_______us__________inthewetlands.(advise/notshout)6.Thecoldweather_______somebirds______southforthewinter.(make/fly)7.Thetrip_______us______moreaboutwildlife.(help/learn)askedtowearheardsingtoldtowatchencouragedtodescribeadvisednottoshoutmadeflyhelped(to)learn1.我父亲经常鼓励我努力学习。Myfatheroftenencouragesmetostudyhard.2.去年李老师教我们打篮球。MrLitaughtustoplaybasketballlastyear.3.语文老师让我们读这篇文章两遍。TheChineseteachermadeusreadthearticletwice.4.为了通过期末考试,我们必须更努力学习。Wemuststudyharderinorderto/topassthefinalexam.Inorderto/Topassthefinalexam,Wemuststudyharder.Recitetherelatedphraseswithto-infinitives.Completetherestoftheexercises.