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1、 -By Li Li XuelianXuelianContent:The InfinitiveAims:To master the forms and functions of the InfinitiveThe difficult point:the Object Complement Practice:the InfinitiveSummarize:the functions of the InfinitiveThe important point:the Object 不定式由“to+to+动词原形动词原形”构成,其否定形式是“not/never to not/never to+动动词原
2、形词原形”。不定式在句中可以作主语、宾语、状语、表语、定语和宾语补足语，但不能单独作谓语。一、不定式的构成及作用：一、不定式的构成及作用：1.The Subject（作主语）作主语）3.The Object(作宾语作宾语)4.The Object Complement(作宾语补足语作宾语补足语）2.The Predicative（作表语作表语）三、三、The key points：To see is to believe.To learn English well is important.1.作主语作主语:单个不定式作主语时单个不定式作主语时,谓语动词用单数。谓语动词用单数。It is+ad
3、j./n.（for/of sb）+to do sth.（当（当adj.表示人的性格特征时用表示人的性格特征时用of sb.）is若不定式太长若不定式太长,往往用往往用it it作形式主语作形式主语,不定式置后不定式置后.is众口难调。众口难调。It is not an easy thing for us to learn English well.2.作表语：作表语：Your task is to clean the classroom.E.g.：To be kind to the enemy is to be cruel to the people.My wish is to go to c
4、ollege.I want to go home.The workers demanded to get better pay.The important point:主语主语+think/consider/find/feel/make/believe+it+adj./n.+(for sb.)+to do4.作宾语补足语：作宾语补足语：常见的用动词不定式作宾语补足语的动词有：常见的用动词不定式作宾语补足语的动词有：The difficult point:The teacher told me to read the text.五看五看 watch see look at observe not
5、ice三使三使 let make have 二听二听 listen to hear一感觉一感觉:feelHis father doesnt let him smoke.His neighbour observed a stranger go into his house.e.g.I made him do his work.He was made to do his work(by me).2 help 后面的后面的“to”可省去可省去e.g.They often help the grandma(to)carry water.1 在在see,watch,look at,notice,obse
6、rve,hear,listen to,feel等表示感觉和等表示感觉和let,make,have等表等表示使役的动词后面，不定式作宾语时要省略示使役的动词后面，不定式作宾语时要省略“to”（注：但在被动语态中（注：但在被动语态中to一定要带上。）一定要带上。）help1.My teacher was made _ his teaching because of poor health.A.giving up B.give up C.to give up D.given up2.It was foolish _ you to make such a mistake.A.for B.of C.to
7、 D.at3.The most urgent thing is _ the boy immediately.A.find B.to find C.to be found D.to finding4.I think it possible _ to the moon in a spaceship.A.to fly B.to flying C.flied D.flying 5.The soldier told Dr.Smith _on operation any more.A.dont go B.didnt go C.not go D.not to go 6.Its our duty _ the
8、old.A.to take good care of B.take good care of C.taking good care of D.to taking good care of7.The patient was warned _ oily（油（油 腻的）腻的）food after the operation.A.to eat not B.eating not C.not to eat D.not eating8.The boy pretended _ when his mother entered.A.sleeping B.to sleep C.to sleeping D.being sleep9.She felt _ her duty to help the old woman.A.it B.that C.this D.them10.I help him _ the heavy box.A.carrying B.to carrying C.carry D.to carried