人教新课标高中英语选修六Unit3GrammarandUsefulStructures教案

Unit3AhealthylifeGrammarandUsefulStructuresTeachingmaterialNSEFCBook6——Unit3TeachingaimsEnablethestudentstomastertheusageofit.Teachingimportant&difficultpointsHowtoenablethestudentstoknowtheusageofit.Teachingaidstaperecorder,slidesTeachingproceduresStep1RevisionCompletethepassagewiththesuitablewordsintheirproperforms.1.dueto6.stress2.addicted7.quit3.alcohol8.drugs4.manage9.pregnant5.cigarettes10.adolescentsSmoking__________,drinking_______ortakingother__________producemanyharmfuleffectsandhavenorealbenefits.Sowhydo___________doit?Somebeginbecausetheybelieveitmakesthemtheirlifepossibly________pressurefromtheirparentsorteachers.Somejustwanttoseewhatitislike.Whattheydon’trealizeisthattheywillgetintothehabitand__________________toquiteasilybutformanyitisaverypainfulprocess.Ofcourse,thebestwaytodealwiththesedrugsisnottostartinthefirstplace.Keys：cigarettes；alcohol；drugs；adolescents；stress；dueto；eventually；addicted;quit；manageStep2LeadinSlideshowDiscovering“It”1．Itrainsheavily.指天气2.Itis20kilometersfromGranddad’shouse指距to离James’.3.ItisNovember11,2005.指日期4.Itis9o’clockatnight指.时间5.Itisbadtosmoke.形式主语6.Itisnogoodsmoking.形式主语7.Itislikelythathewillsucceed.形式主语Step3Theuseof“it”一、“it作”人称代词1.it的最基本用法是作代词，主要指刚提到的事物，以防止重复:Xi’anisabeautifulcity,isnit?’tTheywatchedthetrainuntilitdisappearedinthedistance.也能够指动物或婴儿(未知性其他婴儿或孩子):Isthisyourdog？No,itisn’t.二、it作非人称代词it有时其实不指详细的东西，而泛指天气、时间、日期、距离、价值、胸怀、温度、环境等，称为非人称的it：指天气：Itisalovelyday,isnit?’tItisabitwindy.2.指时间:Itwasnearlymidnightwhenshecameback.3.指环境:Itwasveryquietinthecaf.é4.指距离：Itishalfanhourwalkto’sthecitycentrefrommyhome.指日期：What'sthedatetoday?It'sMay1,2007.指季节：Itissummernow.指胸怀：Itisabout5kilograms.指价值：----What'sthecostoftheT-shirt?----Itis150Yuan.三、it用作形式主语代替作主语的从句、动词不定式、动名词，而把真实作主语的从句、动词不定式、动名词置于句尾。代作主语的动词不定式，其句型为（1）Itbeadj.（forsb.）todosth.此处adj.往常为描绘事件的形容词：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.2）Itbeadj.ofsb.todosth.此处adj.往常为描绘人的形容词：kind，unkind，nice，rude，cruel，considerate，thoughtful，thoughtless，careful，careless，silly，foolish，stupid，clever，wise，crazy.It'skindofyoutohelpmewiththeproblem.（3）It代替作主语的动名词的常有句型It'snogood/usedoingIt's（well）worthdoingIt's（well）worthone'swhiledoing/todoIt's（well）worthwhiledoing/todoIt'snousecryingoverspiltmilk.2．作形式主语代替主语从句1.Itisclear(obvious，true，possible，certain....)that.....该句型中it是形式主语，真实的主语是that指引的主语从句，常译为“清楚（明显，真的，一定．．．）”是主语从句最常有的一种构造。比如：Itisveryclearthatheand’tallsroundlikeatree.Itisstrangethatithasn’beentnoticedbefore.真奇异，它从前没有惹起注意。2．Itisv-edthat=sb/sthistodoItissaid(reported/learned/believed/thought/known/told/hoped.....)that...该句型中的it还是形式主语，真实主语是that指引的主语从句；该构造常译为“听说（据报导，据悉．．．）”。ItissaidthathehascometoBeijing.Itisreportedthatanotherearthsatellitehasbeenputintoorbit.Itis+noun+从句Itisapity(ashame/anhonor/agoodthing/afact/asurprise/...)that...该句型中，that后的从句一般用虚构语气（should+动词原形），should可省去．表示预料之外，常译为“居然。”没有这类意义时，则不用虚构语气。比如：Itisapitythatsuchathing(should)happeninyourclass.这类事居然发生在你们班上，真是遗憾！Itisapitythatheisill.他患病了，真遗憾！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，常常把宾语放在它的补足语后边，而用it作形式宾语，放在宾语补足语从前。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.我以为和他争执没实用。IfounditveryinterestingtostudyEnglish.我发现学英语特别风趣。Hemadeitclearthathewasnotinterestedinthissubject.他特别清楚地表示他对那门学科不感兴趣。五、用于重申句型Itis/was+被重申部分+that/who...Itisnotuntil+被重申部分+that...ImetTomintheparkyesterdayItwasIwhometTomintheparkyesterday.ItwasTomwhoImetintheparkyesterday.ItwasintheparkthatImetTomyesterday.4)ItwasyesterdaythatImetTominthepark.Itwasfiveo’clock_when________Igothome.Itwasatfiveo’clock_that_____Igothome.Itwasshewho／thathadbeenwrong．是她错了。（主语）Itwasthegirlwhom／thatImetjustnow．我方才遇到的就是这个女孩。（宾语）ItwasTomtowhomtheteacherhadtalked．老师与其讲话的那个人是汤姆。（介词宾语）ItwasonMondaynightthatallthishappened．全部这全部就是在礼拜一的夜晚发生的。（状语）Itisnotuntil+被重申部分+that...该句型也是重申句型。主要用于强凋时间状语，译成汉语“直到才”，能够说是not...until...的重申形式。比如:ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkglassesdidIrealizeshewasafamousfilmstar.=Ididnstaruntilshetookoffherdarkglasses.

’trealizeshewasafa六、it

常用的固定搭配1.makeit（1）在口语中间相当于succeed，表示：成功、做到、说定、追上、实时抵达例It'shardtomakeittothetopinshowbusiness.（2）在口语中相当于

fixthedatefor，表示“商定好时间”例—Shallwemeetnextweek？—OK.WejustmakeitnextSaturday.2．takeit/thingseasy相当于Don'tworryordon'thurry.

用来劝辞他人，表示

“不要慌，别担忧，存住气

”例Takeiteasy！Hewilldoitwell.3．Italldepends/thatalldepends在口语中，相当于ithasn'tbeendecidedyet，表示“那得看状况，还没有定下来”例—Areyougoingtothecountrysideforholiday？—It/Thatalldepends.It'suptosb.在口语中，相当于it'sdecidedbysb.表示“由决定，由负责，取决于”例—Shallwegooutfordinner？—It'suptoyou.Step3ExercisesRewritethefollowingsentences,using“It’sthat”.1．I’mstillfitenoughtocycle20kilometersinanafternoon.Thatisamazing.ItisamazingthatIamstillfitenoughtocycle20kilometersinanafternoon.Myfatherhasquitsmoking.Thatiswonderful.Itiswonderfulthatmyfatherhasquitsmoking.3.Youcouldsufferfrombadhealthifyoukeepsmoking.(Itislikely).Itislikelythatyoucouldsufferfrombadhealthifyoukeepsmoking.4.Chinaproducesonethirdoftheworld’cigarettes.Itisreported.ItisreportedthatChinaproducesonethirdoftheworld’cigarettes.5Birdflu( )hitChinaagain.Thatisknowntous.Itisknowntousthatbirdflu( )hitChinaagain.LiYuchungotmorethanonemillionYuanfortheadvertise