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1、Grammar The use of“it”it 真实身份大揭底真实身份大揭底.用作人称代词用作人称代词.用作非人称代词用作非人称代词.It .It 作形式主语作形式主语.It.It 作形式宾语作形式宾语.It.It 用在特定句型中用在特定句型中.It.It 用在固定习语中用在固定习语中“It”用作用作“人称代词人称代词”1.It指代上文中提到的物、事。指代上文中提到的物、事。（简化语言，避免重复）（简化语言，避免重复）eg.Mypenismissing.Icantfindit.Xianisabeautifulcity,isntit?Isthisyourdog？No,itisnt.2.指代性别
2、不明的人（常指指代性别不明的人（常指baby）/说话人不清说话人不清楚性别的人（常在打电话、敲门等时）楚性别的人（常在打电话、敲门等时）:eg.Thebabycriedbecauseitwashungry.Thereisaknockatthedoor.Itmustbethemilkman.3.代替上文中的指示代词代替上文中的指示代词this/that-Whoisthatoverthere?-ItsHelen.用作人称代词用作人称代词“It”用作用作“非人称代词非人称代词”“it”表示天气、时间、日期、距离、价值、度量、温度、表示天气、时间、日期、距离、价值、度量、温度、环境，季节，情况等（称为
3、非人称的环境，季节，情况等（称为非人称的it）：）：Itisabout5kilograms.Howisitgoing?.用作非人称代词用作非人称代词Itisabitwindy.(指天气指天气)Itwasnearlymidnightwhenshecameback.ItsMay1,2007.Itis150yuan.Itissummernow.Itwasveryquietinthecaf.Itishalfanhourswalktothecitycentre（指时间）（指时间）（指日期）（指日期）（指价格）（指价格）(指季节指季节)（指度量）（指度量）(指环境指环境)(指距离指距离)(指情形指情形)“
4、It”用作用作“形式主语形式主语”（8）1.it：形式主语：形式主语todo：真正主语（：真正主语（3）2.it：形式主语：形式主语doing：真正主语（：真正主语（1）3.it：形式主语：形式主语that从句：真正主语（从句：真正主语（4）adj.：legal，illegal，polite，impolite，possible,impossible,clear，obvious，evident,certain，suitable，fit，useful，useless，etc.)一、一、it+be+adj.(+forsb.）+todosth.“（对 sb.来说，）做某事是的。”Itisimporta
5、ntforustolearnEnglishwell.it+be+adj.+ofsb.+todosth.Itskindofyoutohelpmewiththeproblem.Itsgenerous(adj.慷慨的慷慨的)ofyoutodonatesuchalargeofmoneytocharity.（此处此处adj.通常为描述通常为描述“人人”的形容词：的形容词：brave,kind，unkind，nice，rude，considerate，careful，careless，silly，foolish，stupid，clever，wise，crazy.）it+be+n.+todosth.Itis
6、agoodideatoquitsmokingbeforeonecomespregnant.Itisapity/shamenottoseethatscholarintheflesh.“做某事（真）是个做某事（真）是个”常用常用n.有：有：goodidea/apity/ashame等等二、二、it+be+n./adj.+doingsth.eg.Itsnousecryingoverspiltmilk.Itsawasteoftimeplayingcomputergames.Itsworthvisting.Itsuselessthinkingtoomuch.Itsnouse/uselessdoingst
7、h做某事是无用的做某事是无用的Itsnogood/awasteoftime/fun/worthdoingsthItisveryclearthathesroundandtalllikeatree.三、三、1.It+be+adj.+that从句从句.Itiscertainthateverythingwillgetonwellduetoourhardwork.Itisstrangethatheshouldntfeelashamedofhisbehavior.（当（当adj.为为strange/surprising/natural/important/necessary等时，等时，that从句中即从句
8、中即(should)+do）2.it+be+n.+that从句从句.Itisnowonderthatyouarebreathless.Itisapity/shamethatheshouldgetintothehabitofabusingalcohol.（其中，当其中，当n.为为apity(ashame/anhonor/aSurprise.等表示表示出乎意料出乎意料时，常译为时，常译为“竟然竟然”，则则 that 从句中的从句中的v.用虚拟语气，即用虚拟语气，即should+do）。没有这种意义时，则不用虚没有这种意义时，则不用虚拟语气。例如：拟语气。例如：Itisreportedthatman
9、ypeoplediedintheearthquake.3.it+be+V.ed+that从句从句.“据据/有人（人们）有人（人们）”Itissuggestedthatthestudents(should)builduptheirstrength.(其中，当其中，当v.为为insist;command,order;suggest,recommend;require,request,demand等时，等时，that从句中的从句中的v.用虚拟语气，即用虚拟语气，即(should)+do4.it+Vi+that从句从句.(常用常用v.有有happen,seem,appear,looks,等等.)Ith
10、appenedthathemethisteacherinthestreet.eg.Itseemsthathewillbebackinafewdays.“It”用作用作“形式宾语形式宾语”（2）1.“某些谓某些谓v.+it宾语宾语+宾补宾补（n.adj.）+真真宾宾（tododoingthat从句）从句）”.It.It 作作“形式宾语形式宾语”常用的常用的v.有有:think,believe,make,find,consider,feel,etc.Ithinkitnousearguingwithhim.IfounditveryinterestingtostudyEnglish.Hemadeitc
11、learthatsmokingisbannedintheschool.Heconsidersithisdutytohelpthoseatrisk.2.某些某些谓谓v.+it形宾形宾+真宾真宾（that/when/if从句）从句）（常用（常用v.用：用：like,love,appreciate;dislike,hatedependon,counton;seeto,makesure;takeforgranted等。）等。）eg.Idontlikeitwhenonespeakswithhismouthful.eg.IwouldappreciateitifIwereadmittedtotheschoo
12、lfootballteam.eg.Ihateitthatyouspeakwhenyourmouthfull.eg.Donttakeitforgrantedthatfamousbrandsmeanhighquality.eg.Youcandependonitthathewillcomehereontime.Exercises TimeI.单项选择单项选择1.He didnt make _ clear when and where the meeting would be held.(天津天津)A.this B.that C.it D.these 2._ is our belief that im
13、provements in health care will lead to a stronger,more prosperous economy.(浙江浙江)A.As B.That C.This D.It3.The doctor advised Vera strongly that she should take a holiday,but _ didnt help.(全国卷全国卷III)A.it B.she C.which D.he4.Id appreciate _ if you would like to teach me how to use the computer.(山东山东)A.thatB.it C.this D.you1.Reviseandmastertheuseofit.2.Pre-viewtheReading:HIV/AIDS:Areyouatrisk?HomeworkSee you next time!