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GrammarTheuseof“it”it真实身份大揭底Ⅰ.用作人称代词Ⅱ.用作非人称代词Ⅲ.It作形式主语Ⅳ.It作形式宾语Ⅴ.It用在特定句型中Ⅵ.It用在固定习语中“It”用作“人称代词”1.It指代上文中提到的物、事。（简化语言，避免重复）eg.Mypenismissing.Ican’tfindit.Xi’anisabeautifulcity,isn’tit?Isthisyourdog？No,itisn’t.2.指代性别不明的人（常指baby）/说话人不清楚性别的人（常在打电话、敲门等时）:eg.Thebabycriedbecauseitwashungry.Thereisaknockatthedoor.Itmustbethemilkman.3.代替上文中的指示代词this/that--Whoisthatoverthere?--It’sHelen.Ⅰ.用作人称代词“It”用作“非人称代词”“it”表示天气、时间、日期、距离、价值、度量、温度、环境，季节，情况等（称为非人称的it）：Itisabout5kilograms.Howisitgoing?Ⅱ.用作非人称代词Itisabitwindy.(指天气)Itwasnearlymidnightwhenshecameback.It‘sMay1,2017.Itis150yuan.Itissummernow.Itwasveryquietinthecafé.Itishalfanhour’swalktothecitycentre（指时间）（指日期）（指价格）(指季节)（指度量）(指环境)(指距离)(指情形)“It”用作“形式主语”（8）1.it：形式主语todo：真正主语（3）2.it：形式主语doing：真正主语（1）3.it：形式主语that从句：真正主语（4）adj.：legal，illegal，polite，impolite，possible,impossible,clear，obvious，evident,certain，suitable，fit，useful，useless，etc.)一、①it+be+adj.(+forsb.）+todosth.“（对sb.来说，）做某事是…的。”ItisimportantforustolearnEnglishwell.②it+be+adj.+ofsb.+todosth.It'skindofyoutohelpmewiththeproblem.It’sgenerous(adj.慷慨的)ofyoutodonatesuchalargeofmoneytocharity.（此处adj.通常为描述“人”的形容词：brave,kind，unkind，nice，rude，considerate，careful，careless，silly，foolish，stupid，clever，wise，crazy.）③it+be+n.+todosth.Itisagoodideatoquitsmokingbeforeonecomespregnant.Itisapity/shamenottoseethatscholarintheflesh.“做某事（真）是个…”常用n.有：goodidea/apity/ashame等二、it+be+n./adj.+doingsth.eg.It'snousecryingoverspiltmilk.It'sawasteoftimeplayingcomputergames.It’sworthvisting.It'suselessthinkingtoomuch.It’snouse/uselessdoingsth做某事是无用的It’snogood/awasteoftime/fun/worthdoingsthItisveryclearthathe’sroundandtalllikeatree.三、1.It+be+adj.+that从句.Itiscertainthateverythingwillgetonwellduetoourhardwork.Itisstrangethatheshouldn’tfeelashamedofhisbehavior.（当adj.为strange/surprising/natural/important/necessary等时，that从句中即(should)+do）2.it+be+n.+that从句.Itisnowonderthatyouarebreathless.Itisapity/shamethatheshouldgetintothehabitofabusingalcohol.（其中，当n.为apity(ashame/anhonor/aSurprise...等表示出乎意料时，常译为“竟然”，则that从句中的v.用虚拟语气，即should+do）。没有这种意义时，则不用虚拟语气。例如：Itisreportedthatmanypeoplediedintheearthquake.3.it+be+V.ed+that从句.“据…/有人（人们）…”Itissuggestedthatthestudents(should)builduptheirstrength.(其中，当v.为insist;command,order;suggest,recommend;require,request,demand等时，that从句中的v.用虚拟语气，即(should)+do4.it+Vi+that从句.(常用v.有happen,seem,appear,looks,等.)Ithappenedthathemethisteacherinthestreet.eg.Itseemsthathewillbebackinafewdays.“It”用作“形式宾语”（2）1.“某些谓v.+it宾语+宾补（n.\adj.）+真宾（todo\doing\that从句）”Ⅳ.It作“形式宾语”常用的v.有:think,believe,make,find,consider,feel,etc.Ithinkitnousearguingwithhim.IfounditveryinterestingtostudyEnglish.Hemadeitclearthatsmokingisbannedintheschool.Heconsidersithisdutytohelpthoseatrisk.2.某些谓v.+it形宾+真宾（that/when/if从句）（常用v.用：like,love,appreciate;dislike,hatedependon,counton;seeto,makesure;take…forgranted等。）eg.Idon’tlikeitwhenonespeakswithhismouthful.eg.IwouldappreciateitifIwereadmittedtotheschoolfootballteam.eg.Ihateitthatyouspeakwhenyourmouthfull.eg.Don’ttakeitforgrantedthatfamousbrandsmeanhighquality.eg.Youcandependonitthathewillcomehereontime.ExercisesTimeI.单项选择1.Hedidn’tmake____clearwhenandwherethemeetingwouldbeheld.(天津)A.thisB.thatC.itD.these2.____isourbeliefthatimprovementsinhealthcarewillleadtoastronger,moreprosperouseconomy.(浙江)A.AsB.ThatC.ThisD.It3.ThedoctoradvisedVerastronglythatsheshouldtakeaholiday,but______didn’thelp.(全国卷III)A.itB.sheC.whichD.he4.I’dappreciate______ifyouwouldliketoteachmehowtousethecomputer.(山东)A.thatB.itC.thisD.you