人教版高中英语选修六Unit3 A healthy life Grammer it的用法PPT课件.ppt

,英语语法复习Theuseofit,Discovering“It”,Itrainsheavily.2.Itis20kilometersfromGranddadshousetoJames.3.ItisNovember11,2005.4.Itis9oclockatnight.5.Itllbelovelyinthegardentonight6.Itisbadtosmoke.7.Itislikelythathewillsucceed.,天气,距离,日期,时间,形式主语,环境,形式主语,1.it的最基本用法是作代词，主要指刚提到的事物，以避免重复:Xianisabeautifulcity,isntit?2.也可以指动物或婴儿(未知性别的婴儿或孩子):Isthisyourdog？No,itisnt.,一、it作人称代词,it有时并不指具体的东西，而泛指天气、时间、日期、距离、价值、度量、温度、环境等，称为非人称的it：1.指天气：Itisalovelyday,isntit?Itisabitwindy.2.指时间:Itwasnearlymidnightwhenshecameback.3.指环境:Itwasveryquietinthecaf.4.指距离：Itishalfanhourswalktothecitycentrefrommyhome.,二、it作非人称代词,5.指日期：-Whatsthedatetoday?-ItsMay1,2007.6.指季节：Itissummernow.7.指度量：Itisabout5kilograms.8.指价值：-WhatsthecostoftheT-shirt?-Itis150yuan.,替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。,三、it用作形式主语,（1）Itbeadj.（forsb.）todosth.此处adj.通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，wrong，important，unimportant，legal，illegal，well-mannered，ill-mannered，polite，impolite，clear，obvious，certain，suitable，proper，fit，useful，useless，dangerousItisillegal（forateenager）todriveacarwithoutalicense.,1.代作主语的动词不定式,（2）Itbeadj.ofsb.todosth.此处adj.通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，thoughtful，thoughtless，careful，careless，silly，foolish，stupid，clever，wise，crazy.Itskindofyoutohelpmewiththeproblem.,Itsnogood/usedoingIts（well）worthdoingIts（well）worthoneswhiledoing/todoIts（well）worthwhiledoing/todoItsnousecryingoverspiltmilk.,(3)It替代作主语的动名词的常见句型,2.it作形式主语替代主语从句,Itisclear(obvious，true，possible,certain)that.该句型中it是形式主语，真正的主语是that引导的主语从句，常译为“清楚（显然,真的）”是主语从句最常见的一种结构。例如：Itisveryclearthathesroundandtalllikeatree.,Itisadj.+clause,Itissaid(reported/learned/believed/thought/known/told/hoped.)that.该句型中的it仍是形式主语，真正主语是that引导的主语从句；该结构常译为“据说（据报道，据悉）”。ItissaidthathehascometoBeijing.Itisreportedthatanotherearthsatellitehasbeenputintoorbit.,Itisv-edthat=sb./sth.istodo,Itis+noun+从句,Itisapity(ashame/anhonor/agoodthing/afact/asurprise/.)that.该句型中，that后的从句一般用虚拟语气（should+动词原形），should可省去表示出乎意料，常译为“竟然”。没有这种意义时，则不用虚拟语气。例如：Itisapitythatsuchathing(should)happeninyourclass.这种事竟然发生在你们班上，真是遗憾！Itisapitythatheisill.他生病了，真遗憾！,Imstillfitenoughtocycle20kilometersinanafternoon.Thatisamazing.2.Myfatherhasquitsmoking.Thatiswonderful.3.Youcouldsufferfrombadhealthifyoukeepsmoking.(Itislikely).4.Chinaproducesonethirdoftheworldscigarettes.Itisreported.,ItisamazingthatIamstillfitenoughtocycle20kilometersinanafternoon.,Itiswonderfulthatmyfatherhasquitsmoking.,Itislikelythatyoucouldsufferfrombadhealthifyoukeepsmoking.,ItisreportedthatChinaproducesonethirdoftheworldscigarettes.,Birdflu(禽流感)hitChinaagain.Thatisknowntous.6.LiYuchungotmorethanonemillionyuanfortheadvertisement.Peoplesaythat.7.Someyoungpeoplethinkthattheylookattractivewhentheysmoke.Itseemsthat,Itisknowntousthatbirdflu(禽流感)hitChinaagain.,ItissaidthatLiYuchungotmorethanonemillionYuanfortheadvertisement.,Itseemsthatsomeyoungpeoplethinktheylookattractivewhentheysmoke.,四、it作形式宾语,当复合宾语中的宾语是不定式、动名词宾语从句时，往往把宾语放在它的补足语后面，而用it作形式宾语，放在宾语补足语之前。该句型中的it作形式宾语，常用的动词有think,believe,make,find,consider,feel等。,Ithinkitnousearguingwithhim.我认为和他争吵没有用。IfounditveryinterestingtostudyEnglish.我发现学英语非常有趣。Hemadeitclearthathewasnotinterestedinthissubject.他非常清楚地表示他对那门学科不感兴趣。,五、用于强调句型中,Itis/was+被强调部分+that/who.Itisnotuntil+被强调部分+that.,ImetTomintheparkyesterday.,1)ItwasIwhometTomintheparkyesterday.,2)ItwasTomwhoImetintheparkyesterday.,3)ItwasintheparkthatImetTomyesterday.,4)ItwasyesterdaythatImetTominthepark.,Itwasfiveoclock_Igothome.Itwasatfiveoclock_Igothome.,when,that,Itisnotuntil+被强调部分+that.该句型也是强调句型。主要用于强凋时间状语，译成汉语“直到才”，可以说是not.until.的强调形式。例如:ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkglassesdidIrealizeshewasafamousfilmstar.=Ididntrealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.,巩固练习：1.Itwas_hesaid_disappointedme.A.what;thatB.that;thatC.what;whatD.that;what2.Isitinthefactory_thistypeofcarsareproduced?A.whichB.whereC.thatD./3.Isitthefactory_thistypeofcarsareproduced?A.whichB.whereC.thatD./,4._onMondaynightthatallthishappened?A.IsitB.ItisC.WasitD.Itwas5.Itwas_theoldworkercamethatwe_theexperiment.A.until;didntbeginB.notuntil;beganC.untilbeganD.notuntil;didntbegin6.ItisI_singinginthegarden.A.whoareB.whoamC.thatareD.thatis,六、It常用的固定搭配,makeit（1）在口语当中相当于succeed，表示：成功、做到、说定、赶上、及时到达例Itshardtomakeittothetopinshowbusiness.（2）在口语中相当于fixthedatefor，表示“约定好时间”例Shallwemeetnextweek？OK.WejustmakeitnextSaturday.,2.takeit/thingseasy相当于Dontworryordonthurry.用来劝告别人，表示“不要慌，别担心，沉住气”Takeiteasy！Hewilldoitwell.3.Italldepends/thatalldepends在口语中，相当于ithasntbeendecidedyet，表示“那得看情况，还没有定下来”Areyougoingtothecountrysideforholiday？It/Thatalldepends.4.Itsuptosb.在口语中，相当于itsdecidedbysb.表示“由决定，由负责，取决于”Shallwegooutfordinner？Itsuptoyou.,补充完整下列句子:1It_towalktoschooleveryday.每天我走路去学校花了20分钟的时间.2_thathestudiedabroadwhenhewasyoung.据说他年轻时在外国留学3Itis_(cry)overthespiltmilk.覆水难收.4Itis_thatI_theGreatWall.这是我第一次参观长城.5_sheissoangry.难怪她如此生气.Itis_welastmet.自从我们上次相遇已有三年.7It_beforewegraduate.我们不久就要毕业.8Iti