高中英语课件it的用法

Goodmorning,everyone!第一页，共28页。1①Itisnevertoooldtolearn.

②Itiseasiertofallthantorise.

③Itisnousecryingoverspilt(溢出(yìchū)的)milk.④Itneverrainsbutitpours(泼水).

Proverbs(谚语(yànyǔ))with“It〞活到老,学到老。摔倒(shuāidǎo)容易爬起来难。覆水难收。不鸣那么已,一鸣惊人。第二页，共28页。2⑤Itiseasytoopenashopbuthardtokeepitalwaysopen.⑥Ittakesthreegenerations(代,辈)tomakeagentleman.

创业容易(róngyì)守业难。十年树木，百年树人(bǎiniánshùrén)。第三页，共28页。3Grammar:

Useof“It〞第四页，共28页。42023/5/3

课文(kèwén)原句再现1.It’sabeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden.2.Yourmothertellsmethatyoustartedsmokingsometimeagoandnowyouarefindingitdifficulttogiveitup.3.Believeme,Iknowhoweasyitistobeginsmokingandhowtoughitistostop.第五页，共28页。5Theuseof“it〞1.用作人称代词，代表(dàibiǎo)前面提到的人或事物。Who’sit?_________me.Lookatthepicture._____isapictureofourschool.

It’sItthis和that。---Isthisjacketyours?---Yes,______is.it第六页，共28页。6Readandanalyzethefollowingsentences.ItisFridaytoday.ItwasverycoldlastMonday.Itisabout8:30now.Itisabout25kmfromLongxiantoBazi.ItliesinthesouthofShaoguancity.Itis40°C!Yougotahighfever!Conclusion:it可以(kěyǐ)用作非人称代词，表示_____,_____,______,______,______,_____等。DateweathertimedistanceplaceTemperature日期(rìqī)天气(tiānqì)时间距离地点温度第七页，共28页。7e.g:______a.Jimisatthedoor．____wantstoseeyou．b.Someoneisatthedoor．____mustbeJim．A.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(gēnjù)情况用代词he／she；假设是指代身份或性别不明的人，那么用代词itBackC第八页，共28页。81.Ican’tfindmypen.I’mgoingtobuy_____.2.Lifetodayisbetterthan______intheolddays.3.Ican’tfindmypen.Imusthavelost_____.

_____用来指代前面提到的可数名词，所指的是事物本身；______那么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(yīɡè).______用来代替不可数名词或单数可数名词，特指。onethatit

itonethat第九页，共28页。9It作为形式主语当不定式、动名词、从句(cónɡjù)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.第十页，共28页。102023/5/3eg:Itisillegal〔forateenager〕todriveacarwithoutalicense.Itisnecessaryforyoutogivehimaletter.Conclusion：在句1和句2中it的作用是___________,真正(zhēnzhèng)主语是________。

形式(xíngshì)主语不定式短语(duǎnyǔ)〔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…第十一页，共28页。112023/5/3〔2〕It+be+adj+ofsb.todosth此处adj.通常为描述(miáoshù)人的形容词：kind，unkind，nice，rude，cruel，considerate，careless，foolish，stupid，wise，crazy.eg:1.It‘skindofyoutohelpmewiththeproblem.某人做某事某人是…….2It’sfoolishofyoutoquityourjobnow.第十二页，共28页。122023/5/3isnogoodcryingoverspiltmilk.isnousecastingpearlsbeforeswine.在句3与句4中，it的作用是_________,真正(zhēnzhèng)主语是____________.形式(xíngshì)主语动名词短语(duǎnyǔ)构成如下结构：Itis+nouse/nogood/notanygood/notanyuse+doingsth.

第十三页，共28页。13Readandanalyzethefollowingsentences.Itisobviousthatthewaterwastoblame.Isitpossiblethathewillbecomethechairmanofourcountry?ItisamazingthatatmyageIstilllooklikeastudent!Analysis：it是______,句子(jùzi)真正的主语是——____________形式(xíngshì)主语that引导的主语(zhǔyǔ)从句Conclusion：Itis+____+that从句adj.第十四页，共28页。14跟踪训练(xùnliàn)1：Itis+adj.+that从句很明显他已经知道了那个(nàge)坏消息。姚明篮球比易建联打得好是肯定的。Itisobviousthathehasknownthebadnews.ItiscertainthatYaomingplaysbasketballbetterthanYijianlian.第十五页，共28页。15Itissaidthat…据说(jùshuō)……

Itisreportedthat…Itissupposedthat…Itishopedthat…Itiswellknownthat…据报导(bàodǎo)……据推测(tuīcè)……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。

第十六页，共28页。16

1.吸烟危害健康，这是事实(shìshí)。

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第十七页，共28页。17二、it作形式(xíngshì)宾语

第十八页，共28页。181.IfounditveryinterestingtostudyEnglish.我发现学英语非常(fēicháng)有趣。2.Ithinkitnousearguingwithhim.我认为和他争吵没有用。3.Hemadeitclearthathewasnotinterestedinthissubject.他非常(fēicháng)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(yǐjí)_________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(xíngshì)宾语第十九页，共28页。19总结(zǒngjié)：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。第二十页，共28页。20在一些固定(gùdìng)用法中考查常见(chánɡjiàn)的固定用法有:makeitforgetitbelieveitornotDon’tmentionitItdoesn’tmatterIt(That)dependsGotitIt’shardtosayIt’suptoyoutodosth.takeit/thingseasy成功(chénggōng)，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，别担忧，沉住气第二十一页，共28页。21Rewritethesentencesusingan“it〞structure.1Givingupsmokingisdifficult.(Itis…)2Mostpeoplebelievesmokingcausescancer.(Itisbelievethat…)3Don’ttrytoquitonastressfulday.(It’snouse…)4youcouldsufferfrombadhealthifyoukeepsmoking.(Itislikelythat…)Itisdifficulttogiveupsmoking.Itisbelievedthatsmokingcausescancer.Itisnousetryingtoquitonsastressfulday.Itislikelythatyoucouldsufferfrombadhealthifyoukeepsmoking.第二十二页，共28页。22Onemidnight,wasrainingheavily.Marywaslyinginbed.Shecouldn'tfallsleep.Suddenly,sheheardsomeoneknockingatthedoor.“Whois?〞Sheasked.Shelookedattheclockhungonthewall.wasstrikingtwo.“isme.〞Onemananswered.“wasimpossibleforhimtoappearhere.〞shethought.“John?Is__you?〞“Yeah!isme〞themananswered.Sherushedtoopenthedoor.Johnwasjuststandinginfrontofher.HesaidtoMaryexcitedly,“Imissedtheplane.wassaidthattheplaneIwouldtakecrasheddownthreehoursago.ItwasinthatplaneIshouldhavegonetoNewYork.Afterthis,IthinkclearlythatIloveyousomuchIwanttobemarryyou.〞ititItItItItItitthatthat/whichthatthatFillintheblanks第二十三页，共28页。23Translation1.是到戒烟(jièyān)的时候了。(quit)Itistimetoquitsmoking.2.让人惊讶(jīngyà)的是在我这个年纪我依然这么健康。(Itisamazingthat...)ItisamazingthatatmyageIamstillsofit.第二十四页，共28页。24ItseemsstrangethatthemanwhohaddelevopedcommunismshouldhavelivedanddiedinLondon.3.一旦你吸烟(xīyān)上了瘾,你会发现要把它戒掉很难。(addict...to;tough)Onceyouareaddictedtosmoking,you