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动词不定式1构成：to+动词原形2Toseeistobelieve.It’simportanttokeephealthy.1.不定式做主语不定式作主语时,往往放在句子的后面,用it作形式主语.forofIt’s+adj.+sb.+todosth.It’s+adj.+sb.+todostheasy,difficult,hardcareful,clever,foolish,kind,nice31.Itisveryimportantforus____Englishwell.AlearnBlearningCtolearnDlearned2.爬那棵高树对于你来说太危险了。————dangerousforyou________thattalltree.Itistoclimb4Iwanttogohome.Theworkersdemandedtogetbetterpay.Ifounditnecessarytotalktohimagain.2.不定式做宾语think/consider/findit+adj.+todo常用动词不定式作宾语的动词有：hope,refuse,learn,choose,decide,agree,manage,pretend,plan.5Theteachertoldmetocleantheblackboard.Iexpectyoutogivemesomehelp.3.做宾补四看watchseelookat三让letmakehave二听listentohearwarn,tell,allow,help,ask...notice一感:feel6Imadehimdohiswork.Hewasmadetodohiswork(byme).1.—WhereisJim?—Idon’tknowButIsawhim___footballjustnow..A.WaswatchingB.watchingChadwatchingD.watched7Ihavesomethingtosay.Hehasalotofhomeworktodo.Heislookingforaroomtolivein.Thereisnothingtoworryabout.4.不定式做定语(如果不定式中的动词是不及物动词,则不定式中要有介词.)81.不定式所修饰的名词或代词是不定式动作的地点工具等，即使是及物动词，不定式后面仍须有相应的介词。请给我一支写字的笔.Pleasegivemeapentowritewith.2.something,anything,nothing,everything等复合不定代词常用不定式做后置定语。9•who,which,when,how,what等连用，在句中不定式与疑问词起名词作用，可充当主语、表语、宾语等。Hedidn’tknowwhattosay.他不知道说什么。(宾语)Howtosolvetheproblemisveryimportant.如何解决这个问题很重要。(主语)Myquestioniswhentostart.我的问题是什么时候开始。(表语)5.连接词+动词不定式10注意：”疑问词+不定式“作宾语时可以转化为宾语从句。如：Canyoutellmewheretogetthescarf?=Canyoutellme________thescarf?CouldyoutellmehowIshoudgettothepostoffice?=Couldyoutellme_________thepostoffice?whereIcangethowtoget116.固定句型:1.hadbetter(not)dosth.最好（不）做某事2.Why(not)dosth.?为什么不做某事3.Wouldyouliketodosth?你愿意做某事吗？4.Couldyoupleasedosth?你能做某事吗？5.It’s+adj.+for(of)sb.+todosth.做某事怎么样6.findit+adj.+todosth.发现做某事怎么样7.prefer+todoAratherthan(to)8.wouldrather(not)dosth.9.wouldratherdoAthan(do)B宁愿做某事而不愿做另一件事12Exercises1.--You’vedoneverywellthistime.--It’sreallykind______.A.foryoutosaysoB.foryousayingsoC.ofyoutosaysoD.ofyousayingso2.Itisbettertoloseone’slifethan____.A.ifyouloseyourspiritB.losinghisspiritC.toloseone’sspiritD.yourspiritgettinglostCC133.–Ican’tworkinthisway.--Whynot____itinsomeotherway?A.trytodoB.trydoingC.tryingtodoD.tryingdoing4.Sinceyoufinditdifficult____adecision,you’dbetteradiscussion(讨论)withyourparents.A.reach;haveB.reaching;haveC.reach;havingD.toreach;haveBD145.Myfatherhates(痛恨)___.Heneverallowsme_____.A.tosmoke;tosmokeB.smoking;smokingC.smoke;smokingD.smoking;tosmoke6.Thegirlwasbeginning___.A.getangryB.togetangryC.gettingangryD.angryDB157.Thereisn’tanydifferencebetweenthetwo.Ireallydon’tknow________.A.wheretochooseB.whichtochooseC.whattochooseD.tochoosewhich8.Thebagistooheavyforme_______.A.tocarryitB.nottocarryitC.tocarryD.nottocarry9.Theteacherwillteachhim_______.A.touseB.useitC.howtouseitD.usesBCC16