动词不定式专题-初中

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1、WarmupFiveminutestalk…Justforfun"Arewepoisonous?"theyoungsnakeaskedhismother."Yes,dear,"shereplied-"Whydoyouask?""BecauseI'vejustbittenmytongue!"Notes:(1)poisonousadj.有毒的(2)tonguen.舌头一.RevisionⅠ.听写：________________________________________________________________________________________

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3、_____________________________________________________________________________________________________________________Ⅱ.检查作业+知识点回顾二．Newlesson1.SayingsIt’snevertoooldtolearn.Learntowalkbeforeyourun.Assoonasyoutrustyourself,youwillknowhowtolive.Bettertolightonecandlethantocurse（诅咒）thedark

4、ness.Amanmayleadahorsetothewater,buthecannotmakeitdrink.Themanwhohasmadeuphismindtowinwillneversay‘impossible’.Itisnotenoughtobeindustrious（勤劳）.Whatareyouindustriousfor?Trynottobecomeamanofsuccessbutrathertrytobecomeamanofvalue.Amancanfailmanytimes,butheisn’tafailureuntilhebeginstoblam

5、esomebodyelse.Theimportantthinginlifeistohaveagreataim,andthedeterminationtoattain（达到）it.不定式(Infinitive)㈠概念：动词不定式是一种非谓语动词（非谓语动词是指不能作谓语、没有人称和数的变化的动词）。如：Toseeistobelieve.㈡构成：不定式有两种形式①带to的不定式，即to+动词原形，to是不定式符号没有实际意义;②不带to的不定式,即所谓的动词原形。㈢：不定式的时态与语态变化· 主动语态被动语态一般时todotobedone进行时tobedoing 完成时

6、tohavedonetohavebeendone   ㈣作用：不定式（或不定式带宾语或状语构成的不定式短语）可以作主语、表语、宾语，定语、状语、补语。1.作主语(Subject)动词不定式（短语）作主语时，谓语动词用单数，通常用it作形式主语。Nicetomeetyou.It’sdangeroustodrivetoofast.Ittookmeseveralhourstogetthere.Ittookusagreatdealofeffortstofinishthattask.Tosayiseasy,todoisdifficult.=Itiseasytosay,itis

7、difficulttodo.[小叮咛]在Itis+形容词+for/of+sb+todosth句子中，若形容词用于形容sb，则用介词of；若形容词用于形容不定式todosth，则用介词for。Itiskindofyoutohelpme.It’sdangerousforchildrentoswimintheriver.2.作表语(Predicative)不定式可以用于系动词（be,become,feel,look,seem,smell,sound,taste等）之后作表语。Mywishistobeascientist.Hisworkistofeedtheanimal