1：非谓语做主语

1：非谓语做主语非谓语动词作主语(谓语动词用单数)1．动词不定式在句中做主语：1)Toseeistobelieve.2)Tosavetimeistolengthenlife.3)Toliveistowork.4)Togetupearlytodayisunwise.5)Tobeinvitedtoyourhomeismygreathonor.2)不定式作主语时，可采用it作形式主语，而把真正的主语不定式后置。EG:It'sagreathonortobeinvitedtoMary'sbirthdayparty.Itwasimpossibleforlosttimetobemadeup.It'sourdutytotakegoodcareoftheold.固定句型：1.It＋be＋形容词＋forsb＋todo.2.It＋be＋形容词＋ofsb＋todo.EX:用of或for填空1)Itisdifficult______ustofinishwritingthecompositioninanhour.2)It’snecessary____youtolockthecarwhenyoudonotuseit.3)It’sverykind______youtohelpus.4)Itisstupid_____youtowritedowneverythingtheteachersays.5)Itwassilly_____ustobelievehim.3)疑问词who,what,which,when,where,whether,how等后可接不定式,构成不定式短语在句中作主语1）WhentoleaveforLondonhasnotbeendecidedyet.什么时间动身去伦敦还没决定。2）Howtogettherehasn'tbeendecided.还没决定怎么到那里。3）Wheretoholdthemeetingisnotasimplequestion.4）Whattobuyisstillunknown.5）HowtoreachMountTaiismoredifficult.6）Whichtobuyisuptoyou.7)Whethertoholdthepartydependsontheweather.2.动名词在句中作主语：（主动式：doing,one’sdoing）（被动式：beingdone,one’sbeingdone）1)动名词作主语和不定式作主语常可互换。二者也有区别：动名词作主语时，常表经常性，习惯性的动作和行为。而不定式作主语的动作意义较强，多指"要是去做某事"，这种动作往往是"要发生的一次性动作",比较具体.EG:1)Seeingisbelieving.Walkingisaformofexercising.FightingbrokeoutbetweentheSouthandtheNorth.南方与北方开战了。2)Cheatingonanexamruinsone'scharacter.Talkingtohimistalkingtoawall.ReadingEnglishaloudinthemorningwilldoyoualotofgood.Praisingothersisagoodhabit.3)Andbeingpraisedbyothersmakesusproudandexcited.4）Punishingstudentscann’tbringmehappiness,butbeingpunishedcanreallymakemefeeldown.5）Beingrelaxedmakesiteasierforustostoreandremembernewknowledge.Beinghappyisawisechoice.Beingconfidentdoesagreatdealofgoodtoyourlife.2）动名词的复合结构做主语：当动名词有自己的逻辑主语时，常可以在前面加上一个名词或代词的所有格，构成动名词的复合结构(——这时，名词或代词的所有格做动名词的逻辑主语)。动名词的复合结构也可以在句中作主语。EG:1)Their______(come)tohelpwasagreatencouragementtous.2)You’llseethatmy_______(punish)youhasn'tbeensobadforyou.3)Jack's______(notget)tothestationontimemadeallofusworried．4)His______(elect)ourchairmanmadeusthinkalot.3)动名词作主语时，常用于固定句型：A:Itisnogood/nouse/awasteoftime/worthwhile...doingsth；B:Thereisno+doing+从句…".表"不允许、不可能，没必要等"。1)Itisnouse______(wait)forhimanylonger.2)Itisnouse_____(cry)overthesplitmilk.3)Itisnogood_____(learn)withoutpractice.4)Itisworthwhile__________(consult)yourtutoraboutitagain.5)Itisawasteoftime_______(spend)toomuchmoneyonclothes.5)Thereisno______(say)whathewillbedoing.说不准他会干什么。随堂练习：1)Thepresident’s_______(attend)themeetinghimselfencouragesusagreatdeal.2)It’snouse______(complain)withouttakinganyaction.3)______(laugh)atthepoorisnotanactofkindness.4)His______(laugh)atthepoormakesotherslookdownuponhim.5)______(laugh)atbyotherscausesmetobecomepowerful.6)________(bringup)inthecountrysidemadeMr.Smithveryhard-working.7)Thisboy’s_______(notlearn)hardledtohisfailureintheend.8)______(know)whatyoushoulddocertainlydoesgoodtoyourfuture.9)_________(expose)tosunlightfortoomuchtimewilldoharmtoourskin.10)______(keep)thememoryinshapeisimportantatanyage.二：改错：1)Admittedtoatopuniversityisourcommongoal.2)Livingabroadaloneactuallydogoodtoourselves.3)It’snouseaskhimtostopsmoking.4)Tombeinglateagainmadeallofusdisappointed.5)StudentsknowingEnglishwellwillhelpthemtolearnFrench．6)Bepunishedisaterribleexperience.7)Nobeingpunishedis