it用法公开课ppt.ppt

Grammar,Theuseof“it”,Itisnevertoooldtolearn.,It,Howmuchdoyouknowabout“it”?,TheUseof“it”,代词it,引导词it,It句型归纳SentencesWith“it”,1.做人称代词，代替前文提到过的事物。,代词it,Youbodybecomesaccustomedtohavingnicotineinit.,2.用以代替指示代词this,that。,-Whosetext-bookisthat?-Itshers.,-Whatsthis?,-Itsaflag.,Asyouknow,ifyoudothesamethingoverandoveragain,youbegintodoitautomatically.,3.用以代替未知的人或婴儿。,Someoneisknockingatthedoor.Goandseewhoitis.,yourbody,thething,4.做非人称代词，指代时间、天气、距离、环境、季节、日期、价值等。,Itstimeforclass.,Itissummernowanditgetshotterandhotter.,Itsabouttwokilometersfromheretomyhome.,Itisveryquietinourclassroomeverynight.,代词it,-Whatsthedatetoday?-ItsMay15,2013.,-WhatsthecostoftheT-shirt?-Itis150yuan.,时间,天气,距离,环境,季节,日期,价值,Itwasasunnyday.Peterdecidedtogoforawalktotheparkeventhoughitwas2milesaway.Hewasjustabouttoleavethehousewhensomeoneknockedatthedoor.“Whoisit?”,hethought.Whenheopenedthedoor,hefoundnobodybutanoteontheground.Hepickeditupandread.Itissurprisingthatthenoteshouldhavebeengiventohisneighbour.,theuseofit,Discover,天气,距离,未知的人,形式主语,note,2、Itisnogoodsmoking.,3、ItisamamazingthatatmyageIamstillfit.,真正主语,真正主语,形式主语,形式主语,真正主语,形式主语,=Towalkonthestreetwassocomfortable.,=Smokingisnogood.,=ThatatmyageIamstillfitisamazing.,1、Itwassocomfortabletowalkonthestreet.,引导词it,Summary：it作形式主语，代替由不定式（或不定式复合结构）、动名词或从句表示的真正主语。,Discovertheuseofit,此处adj.通常为描述人的形容词：kind;rude;silly，careful;careless;foolish;stupid;clever;wise.Itskindofyoutohelpmewiththeproblem.,（1）Itis+adj.+（forsb.）todosth.,此处adj.通常为描述事件的形容词：easy;hard;difficult;necessary;likely;impossible;important;useful;dangerousItisimportantforateenagertolearnEnglishwell.,（2）Itis+adj.+（ofsb.）todosth.,代替不定式,=tolearnEnglishwellisimportanttoforateenager,=Youarekindtohelpmewiththeproblem.,Structures,e.g.Itisfuntogooutforawalk.,（3）Itis+名词+todosth.,常用的名词有：fun;pity,shame,pleasure.,不可数名词,Itisashametobelateforclass,Itisapleasuretohavethechancetohelpyou.,(5)Itsnogood/usedoing,e.g.Itsnousecryingoverspiltmilk.,(4)IttakesSb.sometimetodo.,e.g.Ittookme3daystopreparethislesson.,代替doing,常见的adj.有:possible;clear;obvious;true,etcItisveryclearthathegrowslikeatree.,(1)Itis+adj.+that从句,(3)Itis+v-ed+that从句,Itissaid(reported/believed/thought/known/told/suggested.)that.译为“据说（据报道，据悉）”。ItissaidthathehasgonetoBeijing.ItisreportedthatChairmanXiwillvisitHangzhou.,(4)Ithappens/seems/appears+that从句,Itseemsthatthereisnowayoutofourdifficulty.,代替主语从句,(2)Itis+n.+that从句,常见的n.有:ashame;apity,afact,etcItisapitythatyoumissedthefootballmatch.,作形式宾语，代替由不定式、动名词或从句表示的真正宾语。,Hefeelsithisdutytohelpothers.,Wethoughtitnousedoingthat.,引导词-it,Hemadeitclearthathewasnotinterestedinthissubject.他非常清楚地表示他对那门学科不感兴趣。,注意：常用的动词有think,believe,make,find,consider,feel等。,注意：,在动词appreciate,dislike,hate，like,love等后面代替if或when等引导的从句。,Iwouldappreciateitifyoucancome.,it代替if引导的宾语从句。,Givingupsmokingisdifficult.Itis2.Someyoungpeoplethinktheylookattractivewhentheysmoke.Itseems3.Mostpeoplebelievesmokingcausescancer.Itisbelieved4.Donttrytoquitonastressfulday.Itisnouse,thatsmokingcausescancer,thatsomeyoungpeoplethinktheylookattractivewhentheysmoke.,difficulttogiveupsmoking.,Practice,tryingtoquitonastressfulday.,1、用it句型改写句子，意思不变。,5.Chinaproducesonethirdoftheworldscigarettes.Itisastonishing6.Youarenotallowedtoadvertisecigarettesinthiscountry.Itisillegal7.Myfatherhasquitsmokingatlast.Itiswonderful8.Thenightwasdarkandstormywhentheoldmanstartedhisjourney.Itwasa9.Youcouldsufferfrombadhealthifyoukeepsmoking.Itislikely10.Youhavetotakepillstocontrolyourbloodpressure.Itisnecessary,thatChinaproducesonethirdoftheworldscigarettes.,toadvertisecigarettesinthiscountry.,thatmyfatherhasquitsmokingatlast.,darkandstormynightwhentheoldman.,thatyoucouldsufferfrombadhealthif.,foryoutotakepillstocontrolyour.,2、用it句型把A句转换为B句，意思不变。1.A.Tokeeporderinanimportantfootballmatchisahardjobforthepolice.B_forthepolicetokeeporderinanimportantfootballmatch.2A.TorecitethepassagesinNewConceptEnglishisaneffectivewayinEnglishstudy.B._inEnglishstudytorecitethepassagesinNewConceptEnglish.,Itisahardjob,Itisaneffectiveway,3.A.Imeantthatyoumightgowithoutme,butIdidntmakethatclear.B.Ididnt_thatyoumightgowithoutme.4A.Memorizing20Englishwordsadayiseasyforme.B.Ifind_20Englishwordsaday.,makeitclear,iteasytomemorize,Practice,5A.Whowilltakeustovisitthenatureparkhasntbeendecidedyet.B._whowilltakeustovisitthenaturepark.6A.Hegetsupearlyandrunsaroundtheplaygroundforhalfanhoureveryday.Hehasmadethatarule.B.Hehasmade_andrunaroundtheplaygroundforhalfanhoureveryday.,Ithasntbeendecidedyet,itaruletogetupearly,7A.Afireisreportedtohavetakenplaceintheexperimentalbuildingthismorning.B._afiretookplaceintheexperimentalbuildingthismorning.8A.Ispenttwohourswritingtheessay.B._towritetheessay.,Itisreportedthat,Ittookmetwohours,Everyoneconsideritimportanttohaveenoughsleep.Theamountofsleepneededvariesfrompersontopersonanditdependsontheageofthepersonandtheconditionsinwhichsleeptakesplace.Theyoungmayneedmoresleepthantheold,butitissaidthateighthoursareenoughforthehealthofgrownups.Somecandowithlessthanthisamount,butothersmayneedmore.Everypersonknowshisownneed.Itisthenamatterofgoodjudgmenttosatisfyhisneed.Sleepisessentialforourhealth.Itisenoughsleepthatcanmakeonebringbackhisstrengthandgetreadyforadayswork.,issaidthat,tohaveenoughsleep,is,that,强调结构,tosatisfyhisneed,Practice,3、辨别it的用法。,HappyNewYear!thegreetingwillbesaidandheardasanewyeararrives.Itisatthistimeoftheyearthatfamiliesandfriendsgettogethertosaygoodbyetotheoldandwelcomethenew.Itwastheoldestofallholidays.Traditionally,itwasthoughtthatonecouldaffectthelucktheywouldhavethroughoutthecomingyearbywhattheydidorateonthefirstdayoftheyear.Forthatreason,ithasbecomecommonforpeopletocelebratethefirstfewminutesofanewyearinthecompanyoffamilyandfriends.Itisapopularbeliefthatanythingintheshapeofaringisgoodluck,becauseitsymbolizescomingfullcircle,completingayearscycle.,Itisatthetimeoftheyearthat,itwasthoughtthat,Practice,newyear,强调结构,Itisnevertoooldtolearn.活到老，学到老。Itiseasiertofallthantorise.摔倒容易爬起来难。Itisnousecryingoverspilt（溢出的）milk.覆水难收。,Proverbswith“It”,Itneverrainsbutitpours(泼水).不鸣则已，一鸣惊人。Ittakesthreegenerations（代）tomakeagentleman.十年树木，百年树人。,I.单项选择1.Hedidntmake_clearwhenandwherethemeetingwouldbeheld.(天津2007)A.thisB.thatC.itD.these2._isourbeliefthatimprovementsinhealthcarewillleadtoastronger,moreprosperouseconomy.(浙江2006)A.AsB.ThatC.ThisD.It,高考实例,3.ThedoctoradvisedVerastronglythatsheshouldtakeaholiday,but_didnthelp.(2005全国卷III)A.itB.sheC.whichD.he4.Idappreciate_ifyouwouldliketoteachmehowtousethecomputer.(山东2006)A.thatB.itC.thisD.you,II.单句改错下面的句子选自高考试题的改错部分，用你的火眼金睛把错误找出来吧！1.Youwontfinddifficulttogettothecitycenter.(2004全国卷IV)2.Iknowthereisnoteasytobeateacher.(湖北2004)3.ThisisnotsurprisingthattheSilverGhostwasregardedas“thebestcarintheworld”.,find后加it,thereit,ThisIt,Seeyounexttime!,1.it指刚提到的事物，以避免重复:Xianisabeautifulcity,isntit?2.也可以指动物、未知的人或婴儿:Isthisyourdog？No,itisnt.,一、it作人称代词,二、it作非人称代词,it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.,七.It的一些习惯用法Howisitwithyourstudy?学习好吗？Thatsi