it. 用法公开课ppt

GrammarTheuseof“it”Howmuchdoyouknowabout“it”?TheUseof“it”代词it引导词itIt句型归纳SentencesWith“it”1.做人称代词，代替前文提到过的事物。代词itYoubodybecomesaccustomedtohavingnicotineinit.2.用以代替指示代词this,that。---Whosetext-bookisthat?---It’shers.---What’sthis?---It’saflag.Asyouknow,ifyoudothesamethingoverandoveragain,youbegintodoitautomatically.3.用以代替未知的人或婴儿。Someoneisknockingatthedoor.Goandseewhoitis.yourbodythething4.做非人称代词，指代时间、天气、距离、环境、季节、日期、价值等。It’stimeforclass.Itissummernowanditgetshotterandhotter.It’sabouttwokilometersfromheretomyhome.Itisveryquietinourclassroomeverynight.代词it---What'sthedatetoday?---It'sMay15,2013.---What'sthecostoftheT-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天气距离未知的人形式主语note2、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itSummary：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。此处adj.通常为描述人的形容词：kind;rude;silly，careful;careless;foolish;stupid;clever;wise...It'skindofyoutohelpmewiththeproblem.（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;dangerous…ItisimportantforateenagertolearnEnglishwell..（2）Itis+adj.+（ofsb.）todosth.=tolearnEnglishwellisimportanttoforateenager=Youarekindtohelpmewiththeproblem.e.g.Itisfuntogooutforawalk.（3）Itis+名词+todosth.常用的名词有：fun;pity,shame,pleasure...不可数名词ItisashametobelateforclassItisapleasuretohavethechancetohelpyou.(5)It'snogood/usedoing…e.g.It'snousecryingoverspiltmilk.(4)IttakesSb.sometimetodo...e.g.Ittookme3daystopreparethislesson.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.(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---itHemadeitclearthathewasnotinterestedinthissubject.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。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。1.Givingupsmokingisdifficult.Itis2.Someyoungpeoplethinktheylookattractivewhentheysmoke.Itseems3.Mostpeoplebelievesmokingcausescancer.Itisbelieved4.Don’ttrytoquitonastressfulday.Itisnousethatsmokingcausescancerthatsomeyoungpeoplethinktheylookattractivewhentheysmoke.difficulttogiveupsmoking.tryingtoquitonastressfulday.1、用it句型改写句子，意思不变。5.Chinaproducesonethirdoftheworld’scigarettes.Itisastonishing6.Youarenotallowedtoadvertisecigarettesinthiscountry.Itisillegal7.Myfatherhasquitsmokingatlast.Itiswonderful8.Thenightwasdarkandstormywhentheoldmanstartedhisjourney.Itwasa9.Youcouldsufferfrombadhealthifyoukeepsmoking.Itislikely10.Youhavetotakepillstocontrolyourbloodpressure.ItisnecessarythatChinaproducesonethirdoftheworld’scigarettes.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.2．A.TorecitethepassagesinNewConceptEnglishisaneffectivewayinEnglishstudy.B.____________________inEnglishstudytorecitethepassagesinNewConceptEnglish.ItisahardjobItisaneffectiveway3.A.Imeantthatyoumightgowithoutme,butIdidn'tmakethatclear.B.Ididn't____________thatyoumightgowithoutme.4．A.Memorizing20Englishwordsadayiseasyforme.B.Ifind__________________20Englishwordsaday.makeitcleariteasytomemorize5．A.Whowilltakeustovisitthenatureparkhasn'tbeendecidedyet.B._____________________whowilltakeustovisitthenaturepark.6．A.Hegetsupearlyandrunsaroundtheplaygroundforhalfanhoureveryday.Hehasmadethatarule.B.Hehasmade______________________andrunaroundtheplaygroundforhalfanhoureveryday.Ithasn'tbeendecidedyetitaruletogetupearly7．A.Afireisreportedtohavetakenplaceintheexperimentalbuildingthismorning.B._________________afiretookplaceintheexperimentalbuildingthismorning.8．A.Ispenttwohourswritingtheessay.B._____________________towritetheessay.ItisreportedthatIttookmetwohoursEveryoneconsideritimportanttohaveenoughsleep.Theamountofsleepneededvariesfrompersontopersonanditdependsontheageofthepersonandtheconditionsinwhichsleeptakesplace.Theyoungmayneedmoresleepthantheold,butitissaidthateighthoursareenoughforthehealthofgrownups.Somecandowithlessthanthisamount,butothersmayneedmore.Everypersonknowshisownneed.Itisthenamatterofgoodjudgmenttosa