高中英语课件-it的用法.ppt

Goodmorning,everyone!,Itisnevertoooldtolearn.Itiseasiertofallthantorise.Itisnousecryingoverspilt(溢出的)milk.Itneverrainsbutitpours(泼水).,Proverbs(谚语)with“It”,活到老,学到老。,摔倒容易爬起来难。,覆水难收。,不鸣则已,一鸣惊人。,Itiseasytoopenashopbuthardtokeepitalwaysopen.Ittakesthreegenerations(代,辈)tomakeagentleman.,创业容易守业难。,十年树木，百年树人。,Grammar:Useof“It”,2019/11/24,课文原句再现,1.ItsabeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden.2.Yourmothertellsmethatyoustartedsmokingsometimeagoandnowyouarefindingitdifficulttogiveitup.3.Believeme,Iknowhoweasyitistobeginsmokingandhowtoughitistostop.,Theuseof“it”,1.用作人称代词，代表前面提到的人或事物。,Whosit?_me.Lookatthepicture._isapictureofourschool.,Its,It,2.用于代替指示代词this和that。,-Isthisjacketyours?-Yes,_is.,it,Readandanalyzethefollowingsentences.,ItisFridaytoday.ItwasverycoldlastMonday.Itisabout8:30now.Itisabout25kmfromLongxiantoBazi.ItliesinthesouthofShaoguancity.Itis40C!Yougotahighfever!Conclusion:it可以用作非人称代词，表示_,_,_,_,_,_等。,Date,weather,time,distance,place,Temperature,日期,天气,时间,距离,地点,温度,e.g:_a.Jimisatthedoor_wantstoseeyoub.Someoneisatthedoor_mustbeJimA.That,ItB.It,HeC.He,ItD.Who,He一般说来，在指代身份或性别明确的人时，通常要根据情况用代词heshe；若是指代身份或性别不明的人，则用代词it,Back,C,1.Icantfindmypen.Imgoingtobuy_.2.Lifetodayisbetterthan_intheolddays.3.Icantfindmypen.Imusthavelost_.,_用来指代前面提到的可数名词，所指的是事物本身；_则用来替代前面出现过的可数名词，泛指，指一类事物中的一个._用来代替不可数名词或单数可数名词，特指。,one,that,it,it,one,that,It作为形式主语当不定式、动名词、从句等用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it.,2019/11/24,eg:Itisillegal（forateenager）todriveacarwithoutalicense.Itisnecessaryforyoutogivehimaletter.Conclusion：在句1和句2中it的作用是_,真正主语是_。,形式主语,不定式短语,（1）It+be+adj.+（forsb.）todosth.此处adj.通常为描述事件的形容词：easy，difficult，hard，necessary，impossible，likely，right，wrong，important，obvious，useful，useless，dangerous,2019/11/24,（2）It+be+adj+ofsb.todosth此处adj.通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，careless，foolish，stupid，wise，crazy.eg:1.Itskindofyoutohelpmewiththeproblem.某人做某事某人是.,2Itsfoolishofyoutoquityourjobnow.,2019/11/24,3.Itisnogoodcryingoverspiltmilk.4.Itisnousecastingpearlsbeforeswine.在句3与句4中，it的作用是_,真正主语是_.,形式主语,动名词短语,构成如下结构：Itis+nouse/nogood/notanygood/notanyuse+doingsth.,Readandanalyzethefollowingsentences.,Itisobviousthatthewaterwastoblame.Isitpossiblethathewillbecomethechairmanofourcountry?ItisamazingthatatmyageIstilllooklikeastudent!Analysis：it是_,句子真正的主语是_,形式主语,that引导的主语从句,Conclusion：Itis+_+that从句,adj.,跟踪训练1：Itis+adj.+that从句,很明显他已经知道了那个坏消息。姚明篮球比易建联打得好是肯定的。,Itisobviousthathehasknownthebadnews.,ItiscertainthatYaomingplaysbasketballbetterthanYijianlian.,Itissaidthat据说ItisreportedthatItissupposedthatItishopedthatItiswellknownthat,据报导,据推测,希望,众所周知,普遍认为,有人建议,Itissaid(reported.)that.,Itissuggestedthat,Itisgenerallyconsideredthat,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。,1.吸烟危害健康，这是事实。2.碰巧我们在同一间大学。3.据说日本发生了地震。4.有人建议他应该立刻戒烟。,Itisafactthatsmokingdoesharmtohealth.,Ithappensthatweareinthesamecollege.,_thereisanearthquakeinJapan.,Itissaidthat,_heshouldquitsmokingatonce.,Itissuggestedthat,二、it作形式宾语,1.IfounditveryinterestingtostudyEnglish.我发现学英语非常有趣。2.Ithinkitnousearguingwithhim.我认为和他争吵没有用。3.Hemadeitclearthathewasnotinterestedinthissubject.他非常清楚地表示他对那门学科不感兴趣。,小结：it在句中充当_，真正宾语可以由_以及_短语充当。还可以由_引导的宾语从句充当。,不定式,动名词,that,形式宾语,总结：当复合宾语中的宾语是不定式、动名词宾语从句时,往往把真正的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。,在一些固定用法中考查,常见的固定用法有:makeitforgetitbelieveitornotDontmentionitItdoesntmatterIt(That)dependsGotitItshardtosayItsuptoyoutodosth.takeit/thingseasy,成功，做到，赶上等别提了，忘了它吧信不信由你别提了，表示不用谢没关系视情况而定明白了，懂了很难说由你来决定做某事不要慌，别担心，沉住气,Rewritethesentencesusingan“it”structure.,1Givingupsmokingisdifficult.(Itis)2Mostpeoplebelievesmokingcausescancer.(Itisbelievethat)3Donttrytoquitonastressfulday.(Itsnouse)4youcouldsufferfrombadhealthifyoukeepsmoking.(Itislikelythat),Itisdifficulttogiveupsmoking.,Itisbelievedthatsmokingcausescancer.,Itisnousetryingtoquitonsastressfulday.,Itislikelythatyoucouldsufferfrombadhealthifyoukeepsmoking.,Onemidnight,wasrainingheavily.Marywaslyinginbed.Shecouldntfallsleep.Suddenly,sheheardsomeoneknockingatthedoor.“Whois?”Sheasked.Shelookedattheclockhungonthewall.wasstrikingtwo.“isme.”Onemananswered.“wasimpossibleforhimtoappearhere.”shethought.“John?Is_you?”“Yeah!isme”themananswered.Sherushedtoopenthedoor.Johnwasjuststandinginfrontofher.HesaidtoMaryexcitedly,“Imissedtheplane.wassaidthattheplaneIwouldtakecrasheddownthreehoursago.ItwasinthatplaneIshouldhavegonetoNewYork.Afterthis,IthinkclearlythatIloveyousomuchIwanttobemarryyou.”,it,it,It,It,It,It,It,it,that,that/which,that,that,Fillintheblanks,Translation,1.是到戒烟的时候了。(quit)Itistimetoquitsmoking.,2.让人惊讶的是在我这个年纪我依然这么健康。(Itisamazingthat.)ItisamazingthatatmyageIamstillsofit.,ItseemsstrangethatthemanwhohaddelevopedcommunismshouldhavelivedanddiedinLondon.,3.一旦你吸烟上了瘾,你会发现要把它戒掉很难。(addict.to;tough)Onceyouareaddictedtosmoking,youwillfindittoughtogiveitup.,4.这似乎是一件怪事：这位发展了共产主义的人竟然在伦敦生活过，并且在伦敦去世。,5.I(认为有必要)totakeplentyofhotwatereveryday.(think)6._(据说)theprofessorhasalreadysucceededincarryingoutthisexpriment.(say)7._tohavesucceeded(已成功)incarryingoutthisexpriment.(succeed)8._Itislikelyforme_(我也许可以