Lesson8UnitReviewFunctions:makingsuggestions用于征求别人的意见和建议，询问消息和情况的句子有：What/Howabout…?Can/Couldyou…?Wouldyoulike/love…?Let’s…,shallwe?Whichdoyoulikebetter,AorB?Shallwe…?Will/Wouldyouplease…?Do/Wouldyouminddoing/ifI…?Whynot…?Whydon’tyou…?Structures:learn/know…byheart(be)relatedto…asetnumberofinthemiddleof…fillintheblanksboth…and…decidetodo…Makesentencesusingthefollowingstructuresandexpressions:learn/know…byheart(be)relatedto…asetnumberofinthemiddleof…fillintheblanksboth…and…decidetodo…Grammar:Infinitives动词不定式Infinitives动词不定式的基本形式to+动词原形有时可以不带to(秃头不定式）动词不定式的否定形式not/never+todonot/never+do动词不定式的否定形式ZhangMingaskedmenottostayathomeallday.Mymotherletmenotdoitbymyself.不定式的逻辑主语It’sgoodforyoutodomorningexercises.Thequestionistoodifficultforustoanswer.It’stoodarkformetoseeanythingintheroom.It’sverykindofyoutothinkoftheothers.如果要说明不定式表示的动作是谁做的，可以在不定式前加一个for(of)引起的短语。介词for(of)的宾语叫不定式的逻辑主语。动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，动词不定式具有名词，形容词和副词的特征，它也仍保持动词的特点，它可以有自己的宾语和状语。这种带宾语或状语的不定式结构称为“”不定式短语。定义1.作主语2.作宾语3.作宾语补足语4.作定语5.作状语6.作表语7.与疑问词等连用请你思考：动词不定式在句子中可以作什么成分？三.用法/功能Toseeistobelieve.It’sexcitingtosurfontheInternet.(1).作主语作主语的不定式如果很短，通常位于句首；若不定式（短语）较长时，常用it作形式主语，而把真正的主语（即动词不定式）放在后面以避免头重脚轻。Iwanttogohome.Theworkersdecidedtogetbetterpay.Ifounditnecessarytotalktohimagain.(2)宾语常用动词不定式作宾语的动词有：want,hope,wish,refuse,learn,wouldlike,choose,decide,agree,pretend,expect,plan…Hefounditverydifficulttogettosleep.不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。Theteachertoldmetocleantheblackboard.Iexpectyoutogivemesomehelp.Heoftenhelpsme(to)repairmybike.(3).宾补常用动词不定式作宾补的动词有：tell,ask,want,warn,wish,allow,encourage,expect,teach,help…Thebossmakesthemwork15hoursaday.Isawtheaccidenthappenyesterday.Hewasmadetodohiswork(byme).五看watchseelookatobservenotice三使letmakehave二听listentohear一感觉:feel感官动词和使役动词等后接不定式作宾补时，需省to。但在被动语态中要还帽子。Ihavesomethingtosay.Hehasalotofhomeworktodo.Heislookingforaroomtolivein.Thereisnothingtoworryabout.(4).定语动词不定式若在句中作定语，常放在被修饰的名词或代词后。如果不定式中的动词是不及物动词,则要带上与之搭配的介词，构成及物动词短语。Hegotupearlytocatchthetrain.Let’sstoptohavearest.I’mveryhappytoseeyou.He’stooyoungtogotoschool.Sheisoldenoughtodressherself.(5)状语动词不定式作状语主要用来表示目的，原因，或结果等。Myjobtohelpthepatient.Yourtasktocleantheclassroom.isis(6).表语不定式可以放在be动词后，形成表语。(7)与疑问词连用不定式与疑问词who,which,when,how,what等连用，形成带疑问词的不定式。在句中起名词作用，可充当主语、表语、宾语等。Hedidn’tknowwhattosay.(宾语)Howtosolvetheproblemisveryimportant.(主语)Myquestioniswhentostart.(表语)在与why连用时，只用于why或whynot开头的简短疑问句中，后面紧跟的动词不定式不带to。Whydosth.?Whynotdosth.?注意事项1.有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：remembertodo记住要做某事；rememberdoing记得曾...
