动词不定式上课课件.ppt

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1、TheInfinitive动词不定式动词不定式的构成：(not)to+do(动词原形)动词不定式在句子可以做：主语（Subject）表语（Predicative）宾语（Object）宾补（Objectcomplement）定语（Attributive）状语（Adverbial）Ⅰ主语:不定式用作主语的用法Togrowtreesisveryimportant.Itisveryimportanttogrowtrees.不定式作主语时,往往放在谓语之后,用it作形式主语。Sayinanotherway,using‘it’.Tolearnfr

2、omyourfriendsisimportant.Toleavewithoutsayinggoodbyeisimpolite.TochatwithMissWhiteisapleasantthing.Towalktoschooltakesmetenminutes.Itisimportanttolearnfromyourfriends.Itisimpolitetoleavewithoutsayinggoodbye.ItisapleasantthingtochatwithMissWhite.Ittakesmetenminutestowalk

3、toschool.It做主语的动词不定式句型1.It+be+adj.+for/ofsb.todosth.for:adj.多为描述不定式行为的特征（important/necessary/interesting等.）of:adj.多为描述主语的品质特征（kind/nice/friendly/wise/foolish等.）作主语Itiseasy_______hertolearnEnglishwell.Itisclever________youtosolvetheproblem.offor2、Ittakessb.sometimetodost

4、h.我每天花去三个小时完成家庭作业。Ittakesmethreehourstofinishthehomeworkeveryday.3、Itis+n.(forsb)todosth.ItismypleasuretohelpyouwithyourEnglish.练习：对他来说，说英语很容易。对我们来说，努力学习是必要的。您能帮助我，真是太好了。ItiseasyforhimtospeakEnglish.Itisnecessaryforustostudyhard.Itisverykindofyoutohelpme.1、Itisnecessary

5、______ustolearntowait.(of/for)2、Itwascareless______metobreakthecup.（of/for)3、Ittookthem1,000yuan_________thistable.(buy)4、Itismypleasure_________theboxforyou.(carry)tobuyforoftocarry练习5、轮到我们打扫教室了。Itisourturn_________________________6、Towastetimeistoshortenlife.（翻译成中文）to

6、cleantheclassroom.浪费时间就是缩短生命。练习Ⅱ表语：不定式放在be动词后面，用作表语Mydreamistoownarobot.Itsworkistocleantheroomeveryday.主语多为duty/wish/hope/idea/plan/ambition/dream/work/job等名词，主语通常不是人。动词不定式做表语的作用：说明主语内容Completethefollowingsentences.1.Thedoctor’ssuggestionis______(take)moreexercise.2.Th

7、ebestwayis______(talk)toyourparents.3.Hisplanis______________________________(今年夏天到北京旅游).4.Mypurposeis__________________________(帮你解决这个问题).totaketotalktotraveltoBeijingthissummertohelpyousolvethisproblem不定式,动名词都可作表语,有何区别？1.动名词和动词不定式都可以做表语说明主语的内容。所以他们可以互换。Ourworkisservin

8、gthepeople/toservethepeople动名词和动词不定式做表语时，主语与表语位置可以互换。Servingthepeople/toservethepeopleisourwork.动名词和动词不定式做表语时可