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动词不定式九年级英语语法复习教学课件主讲人：黄牛蹄中学田忠勤动词不定式(to+v.)概述：动词不定式todo没有人称和数的变化，在句中不能独立作谓语，可以在句子中作宾语、宾语补足语、状语、定语、主语、表语等。其否定式为：nottodo①如果不定式动词为不及物动词，后面的介词千万不要省略如：Ihavesomethingimportanttotellyou.Maybetheyhavethreeroomstolivein.(1)作定语②与被修饰词有主谓关系如：MrLiisalwaysthefirsttocomeandthelasttoleave.通常在agree，begin，choose，come，decide，expect，hope，fail，forget，happen，help，learn，like，love，mean，try，manage，offer，remember，plan，prepare，promise，refuse，want，wait，wish等后加todosth.做宾语。(2)作宾语eg:IhavedecidedtogotoXinhuaPrimarySchool.你知道有哪些动词后面可以跟动词不定式作宾语吗？说说看：eg:Myideaistoringhimupatonce.Myfather’sjobistomakesickpeoplebetter.(3)作表语通常加在wish,hope,idea,job等词后作表语。③动词help接动词不定式作宾语补足语，可带to也可不带to。如：Canyouhelpme(to)carrytheheavybag?(4)作宾语补足语①动词+宾语+不定式allow，ask,beg,choose,expect,invite,tell,want,wish，等动词后接动词不定式作宾语补足语。如：Thepolicemenaskedhimtogetoffthebus.②hear,see,feel,watch,notice,let,make,have等动词后接不带to的动词不定式作宾语补足语。如：WeoftenseeMissLicleantheclassroom.Inthosedaysthebossesoftenmadetheworkersworkdayandnight.eg:TolearnEnglishisveryimportant.(5)作主语=It'sveryimportanttolearnEnglish.形容词good,bad,polite,friendly,kind,foolishclever,right,wrong,careful等用“Itis+adj+ofsb.todosth.”其他形容词用for。常用“Itis+adj+for/ofsb.todosth”的句式如：It‘sdangerousforyoutoridesofast.It'sverykindofyoutohelpme.表示目的、原因、方法、方向、结果等(6)作状语如：I'llgotomeetmyfriendattherailwaystation.Heranfastenoughtocatchthebus.Sheistootiredtogofarther.(二)动词不定式的否定式：nottodoTheteachertoldthechildrennottoplaywithfire.Theywarnthechildrennottoplayfootballinthestreet.TherearesomanykindsofradiosonsalethatIcan'tmakeupmymindwhichkindtochoose.→TherearesomanykindsofradiosonsalethatIcan‘tmakeupmymindwhichkindIshouldchoose.(三)．动词不定式与疑问句who,what,which,when,how,where,whether等连用,相当于一个从句。常见词：decide,know,forget,learn,remember,show,understand,see,wonder,hear,explain,tell，findout,makeupone’smind等如：Idon'tknowwhentostart.→Idon'tknowwhenwe'llstart.特殊的非谓语动词(1)可接不定式，也可接动词的-ing形式的动词①意义差别较大的有：forget,remember,stop,goon等。Heforgottoposttheletter.Heforgotpostingtheletter.Theystoppedtosingasong.Theystoppedsinging.②意义有差别的有：watch,see,hear,notice,feel,like(2)只能接动词的-ing形式的动词或动词短语enjoy,finish,keep,mind,practise,suggest,bebusy,giveup,lookforwardto,prefer…to…等。如：ThestudentsarebusypickingappleWouldyoumindmyopeningthedoor?中考链接1.It’shappyforme__________(have)thebike.2.Theyprefer__________(stay)athomeratherthangoout.3.Heisoldenough__________(join)thearmy.4.Hisbossmadehim__________(finish)theworkafterfive.5.Hisplanis__________(spend)hersummerinShanghai.6.Haveyougotanything__________(say)?7.Doyouknowwhen__________(start)ourwork?8.Hewentout__________(carry)thebigbag.9.__________(do)thehomeworkatschoolisourduty.10.Mrlitoldme__________(clean)theclassroomafterclass.tohavetostaytojoinfinishtospendtosaytostarttocarryTodotocleanprefer用法归纳•prefertodosth更喜欢做某事•prefertodosthratherthandosth宁愿做...而不做....•preferdoingsthtodoingsth和做......比更喜欢做......Thankyou!Goodbye!