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1、动词系列之三：动词不定式动词不定式是初中英语的语法重点之一。它没有人称和数的变化，不能单独作句子的谓语。其构成形式为＂to+动词原形＂。一、动词不定式作主语1.It'sourduty_______theroomeveryday. A.tocleanB.cleanedC.cleanD.cleans2.It'shardforus_______Englishwell. A.learnB.learnsC.tolearnD.learning3.建造这座立交桥将花费工人们一年多的时间。 Itwill____theworkersoverayear______theflyover.4.It'sver
2、ynice__youtogetmeaticket__theWorldCup. A.for，ofB.of，forC.to，forD.of，to(安徽省)直接把动词不定式置于句首的情况不多，多数情况用it作形式主语，把真正的主语—动词不定式置于句末，特别是不定式短语较长时。常见的句式有：(1)Itis+形容词(ofsb)todosth.常用nice,kind,clever,good,right,wrong,foolish,careless等形容词，与介词of搭配，说明人的特性；(2)Itis+形容词(forsb)todosth.常用hard,difficult,easy,important
3、等形容词，与介词for搭配，一般说明不定式动作的特性。(3)Itis+名词(forsb)todosth.Itisdutyformetostudy.二、动词不定式作宾语wanttodosth1.Hewants____somevegetables. A.buyB.buyingC.tobuyD.buys2.Don'tforget__yourhomeworkwithyoutomorrow. A.tobringB.bringingC.totakeD.taking3.Hefounditverydifficult____.A.sleepingB.sleepsC.sleptD.tofallaslee
4、p1.可以接带to的动词不定式作宾语的动词主要有：ask,choose,agree,expect,hope,decide,learn,prefer,pretend,know,wish,want,wouldlike/love.2.decide,know,learn,show,teach,tell+特殊疑问词+todo(whydosth)Idon’tknowwhattodo.Showmehowtodoit.Iwanttoknowwhygothere.某些动词后面接不定式和接动词-ing意思不同stoptodosth：停止正在做的事情去做另外一件事；stopdoingsth：停止正在做的事。r
5、emembertodosth：记住去做某事(事还未做)；rememberdoingsth：记得做过某事(事已做)。goontodosth：接着做某事(做完一事，接着做另一事)；goondoingsth：继续做某事(一事未做完接着往下做)。forgettodosth：忘了做某事(事还未做)；forgetdoingsth：忘了曾做过某事(事已做)。trytodo：尽力做；trydoing：试试做。三、动词不定式作宾语补足语asksbtodosth1.Robertoftenasksus______hisChinese,sohisChineseismuchbetterthanbefore.A.h
6、elphim;B.tohelphimwith;C.tohelpwith;D.helpshimwith;2.MrLioftenteacheshisJapanesefriends__Chinesefood.A.cookB.cooksC.tocookD.cooked不定式可以用作宾语补足语。后面可以接不定式作宾语补足语的动词有：ask，teach，expect，tell，allow等。注意：省略to的动词不定式makesbdosth1.Wesawhim______thebuildingandgoupstairs. A.toenter;B.enter;C.entering;D.entered2
7、.Somuchworkusuallymakesthem______verytired. A.tofeel;B.feels;C.feeling;D.feel3.Yourfatherissleeping.You'dbetter______. A.notwakeuphim;B.nottowakeuphim C.notwakehimup;D.nottowakehimup4.Iwasmade______myhomeworkintheaf
