it用法公开课课件.ppt

it,Discussion,Whatjobscan“it”do?,It用法归纳一、指代it二、形式it三、强调it四、含有it的短语、谚语,Lookatthepicture._isapictureofourschool.,It,一、1.用作人称代词,代表前面提到的人或事物.,Mypenismissing.Icantfind_anywhere.,it,-Isthisjacketyours?-Yes,_is.,2.用于代替指示代词this和that。,it,3.用以表示时间、距离、天气、季节、环境等.,.Its10:08.Itsonlyhalfanhourswalkfromheretoourschool.3)Itissunnytoday,isntit?4)Itsspringnow.5)Itsquiethere.,Time,Distance,Weather,Season,Circumstance（环境）,4、可以用来指动物、婴儿和未确定身份的人。Whoisit?,Itslovely.,Itweighsonly3kilos.,二形式it-形式主语，形式宾语,ItisvitalforallofyoutohaveagoodcommandofEnglish.,你们掌握英语是至关重要的。,形式主语,TohaveagoodcommandofEnglishisvitalforallofyou.,1.代替动词不定式做主语,1)Itbeadj.(forsb.)todosth.此处adj.通常为描述事件的形容词:easy,difficult,necessary,important,possible,useful,useless,vital（至关重要的）,essential（必要的）.,Makesentences:,1.我们保持自然界的平衡是有必要的。,Itisnecessaryforustokeepthebalanceofnature.,2.在日常生活中练习你的英语口语是非常重要的。,ItsveryimportantforyoutopractiseyouroralEnglishindailylife.,你让我们做这些练习是明智的。,Itiswiseofyoutoletusdotheseexcises.,Itskindofyoutohelpmeworkouttheproblem.,2)Itbeadj.ofsb.todosth.此处adj.通常为描述人的形容词:kind,nice,rude,polite,cruel,considerate（细心的）,thoughtful,careful,careless,foolish,stupid,clever,wise.,你能帮我，真好。,Itsverykindofyoutohelpme.,Itsveryniceofyoutooffermeaseat.,给我让座，您太好了！,Makesentences:,3It+takes、took(sb.)+时间/金钱/精力等+动词不定式,Ittookmemuchtimetoedit（编辑）thispowerpoint.,说实话需要很大的勇气。,Ittakesgreatcouragetotellthetruth.,成功需要付出极大的努力。,Ittakesgreatefforts/painstosucceed.,Itsnogood/use/pleasuredoing做没益处，没用，没趣,2.代替动名词做主语,Itisnousecryingoverspiltmilk.,只阅读不理解没什么益处。,Itisnogoodreadingwithoutunderstanding.,Itispossiblethatwewillrealize（实现）ourdreamsoneday.,3.代替主语从句作形式主语,1)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。,Itisadj.+从句,显然，手机给我们带来了许多好处。,Itisclearthatcellphoneshavebroughtusalotofbenefits.,Itisnecessarythatyou(should)rememberthe3500words.,2)Itisimportant(necessary，strange，natural,surprising.)that.that后的从句中要用虚拟语气（should+动词原形。,我们用有效的方法学习很重要。,Itisimportantthatweshouldlearninaneffectiveway.,Itissaidthathehasasecretweaponinmathslearning.,Itissaid(reported/believed.)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)”。,Itisv-edthat,人们相信健康比财富更重要。,Itisbelievedthathealthismoreimportantthanwealth.,Itisashamethatourcityhasbeenundertheshadowofsmogthesedays.,Itis+noun+从句,Itisapity(ashame/anhonor/afact/asurprise/.)that.很遗憾/可耻的是/很荣幸,很遗憾你不能来参加这个派对。,Itisapitythatyoucouldntcometotheparty.,我很荣幸被邀请参加你的生日聚会.,ItisanhonorthatIwasinvitedtoyourbirthdayparty.,Ithappens(seem,appears,turnsout,)等不及物动词+that.碰巧.看来结果证明.Itseemedthathedidnttellthetruth.IthappenedthatIwasoutwhenhecalled.,Itis(high)timethat.从句应该用虚拟语气，常用过去时态表示虚拟有时也用should+动词原形，should不能省，常译为是（正是）的时侯,Itistimethatweshouldworkhard.,Itishightimethatweshouldtakeactiontodealwiththeenvironmentalproblems.,是我们采取行动解决环境问题的时候了！,形式宾语,动词+it+形容词/名词+（forsb）todo/doing+that从句,think,believe,consider,feel,make,find,harduselessimportantnecessarynatural/essential,nouse/nogood/awasteoftime/ourduty,IfounditveryinterestingtostudyEnglish.,形式宾语,Ithinkiteveryonesdutytoprotectourmothertheearth.,Ithinkitimportantthatyou(should)makeaplan.,IhavemadeitarulethatIwilldosomeEnglishreadingeveryday.规定，习惯于,我发现学英语很有趣。,我认为保护我们的地球母亲是每个人的责任。,我认为你制定一个计划很重要。,it作形式宾语的特殊句型,结构动词+it+if/that/when动词有喜欢类：enjoy,like,appreciate,prefer讨厌类：hate,dislike如果你能给我这个机会我将不胜感激。Iwouldappreciateitifyoucanoffermethechance.Ilikeitwhenmymotherishappy.Ihateitwhenpeopletalkwiththeirmouthsfull.,Hetookitforgrantedthathewouldpasstheexam.Dontdepend/relyonitthathewillarriveontime.IowedittoTomthatIfoundthejobIwanted.,想当然地认为,指望,把什么归功于某人,Theymadeavow（誓言）ofloveinfrontofthehugestonein2005.,三.强调句型,It+be+被强调部+that/who(aperson)其他部分,Itwasthecouplethat/whomadeavowofloveinfrontofthehugestonein2005.,Itwasavowoflovethatthecouplemadeinfrontofthehugestonein2005.,Itwasinfrontofthehugestonethattheymadeavowoflovein2005.,Itwasin2005that,Itwasfiveoclock_Igothome.Itwasatfiveoclock_Igothome.,when,that,AthatBwhen,ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.Itisnotuntil+that.直到才,请指出下列句子的强调部分：,Itiswhatwethinkthatcontrolsus.,四、it常用的固定搭配,makeitsucceed成功、搞定ItwashardbutIfinallymadeit.2.takeiteasy不要慌,别担心。3.Italldepends/thatalldepends.那要视情况而定。4.Itsuptosb.这取决于你。,Itisnevertoolatetolearn.,Itsnousecryingoverspiltmilk.,Striketheironwhileitishot.,高考链接,Thescientistsnextresearchjobwasclear:Findoutwhatinthefishsbloodkeptitfromfreezing.Theirsearchledtosomereallystrangethingmadeupofaprotein(蛋白质)neverbeforeseeninthebloodofafish.Whenitwasremoved,thebloodfrozeatseawatertemperature.（2008辽宁）,70.Whatdoestheunderlinedword“it”inParagraph5referto?A.Atypeofice-saltmixture.B.Anewlyfoundprotein.C.Fishblood.D.Sugarmolecule(分子）.,B,阅读,1.Janewaswalkingroundthedepartmentstore.Sherememberedhowdifficult_31_wastochooseasuitableChristmaspresentforherfather.(2009广东）,2.Heaskedhisteacher,Sir,thewaterwasawful.Whydidyoupretendtolike38?“（2010广东）,语法填空,it,it,4.Will_matterifyoudonttakeyourbreakfastRecentlyatestweregivenintheUnitedSates.,3._isknowntoallthatthetimewecanuseislimited.Thereforewesho