阶段专题复习Unit2一、动词不定式【观察领悟】仔细观察例句,体会动词不定式在句中所作的句子成分。1.I’dliketohelphomelesspeople.()2.Thegirlcouldvisitthesickkidsinthehospitaltocheerthemup.()3.Mariobelievesitcanhelphimtogethisfuturedreamjob.()4.It’sveryimportanttokeephealthy.()5.Herjobistolookafterthechildren.()答案:1.宾语2.状语3.宾语补足语4.主语5.表语【探究总结】1.构成。“动词不定式的基本形式是to+”动词原形,有时可以不带to。2.特征。(1)动词不定式(或不定式短语)没有人称和数的变化,在句子中不能作谓语。(2)动词不定式仍保留动词的特点,即可以有自己的宾语和状语。动词不定式同它的宾语或状语构成不定式短语。3.句法作用。动词不定式具有名词、形容词和副词的特征,在句中可以作主语、表语、宾语、宾语补足语、定语和状语。4.否定形式。“由not+”动词不定式构成。5.和疑问词连用。动词不定式可以和what,which,how,where,when等疑问词连用,构成不定式短语。6.省略to。有些动词后用作宾语补足语的不定式通常不带to。这种动词有两类:一类是感官动词,如see,hear,watch,feel,notice等;另一类是某些使役动词,如let,make,have等。7.注意事项。(1)动词不定式(或短语)作主语或宾语时常用it作形式主语或形式宾语,而动词不定式(或短语)放置于后面。(2)不定式作定语时,若动词为不及物动词,则须有相应的_____。例如:Hehasnochairtositon.他没有椅子坐。介词(3)将主动语态变为被动语态时,作宾语补足语的动词不定式变为主语补足语,“动词不定式则不省to”。例如:Sometimesthebossmadehimworktenhoursaday.(Sometimeshewasmadetoworktenhoursadaybyhisboss.)有时老板让他一天工作十个小时。【实战演练】Ⅰ.用所给动词的适当形式填空1.It’simportantforus(have)ahealthylifestyle.2.Mywishis(become)areporter.3.Don’tforget(lock)thedoorwhenyouleave.4.Wouldyoulike(go)andhaveapicnicwithustomorrow?5.Ioftenhearthegirl(play)thepianointhenextroom.答案:1.tohave2.tobecome3.tolock4.togo5.playⅡ.单项选择1.Itistimeforusthemeeting.A.hadB.tohaveC.havingD.have2.Pleasetellhimintheriveralone.It’sdangerous.A.toswimB.swimmingC.nottoswimD.tonotswim3.Shecameherehergrandparents.A.visitB.tovisitC.visitingD.visited4.Ineedapieceofpaper.A.towriteB.towriteitC.writeonD.towriteon5.—Idon’tknowtheCDplayer.Couldyouh...
