英语选修6unit3语法 it的用法ppt课件

.,Grammar,Theuseof“it”,.,it真实身份大揭底,.用作人称代词,.用作非人称代词,.It作形式主语,.It作形式宾语,.It用在特定句型中,.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.Icantfindit.Xianisabeautifulcity,isntit?Isthisyourdog？No,itisnt.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?-ItsHelen.,.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?,.用作非人称代词,Itisabitwindy.(指天气)Itwasnearlymidnightwhenshecameback.ItsMay1,2017.Itis150yuan.Itissummernow.,Itwasveryquietinthecaf.Itishalfanhourswalktothecitycentre,（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）,it：形式主语todo：真正主语（3）it：形式主语doing：真正主语（1）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、,it+be+adj.(+forsb.）+todosth.,“（对sb.来说，）做某事是的。”,ItisimportantforustolearnEnglishwell.,.,it+be+adj.+ofsb.+todosth.,Itskindofyoutohelpmewiththeproblem.Itsgenerous(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.）,.,it+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.Itsnousecryingoverspiltmilk.,Itsawasteoftimeplayingcomputergames.Itsworthvisting.,Itsuselessthinkingtoomuch.,Itsnouse/uselessdoingsth做某事是无用的Itsnogood/awasteoftime/fun/worthdoingsth,.,Itisveryclearthathesroundandtalllikeatree.,三、1.It+be+adj.+that从句.,Itiscertainthateverythingwillgetonwellduetoourhardwork.,Itisstrangethatheshouldntfeelashamedofhisbehavior.,（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)+do,.,4.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（tododoingthat从句）”,.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;takeforgranted等。）,eg.Idontlikeitwhenonespeakswithhismouthful.,eg.IwouldappreciateitifIwereadmittedtotheschoolfootballteam.,eg.Ihateitthatyouspeakwhenyourmouthfull.,eg.Donttakeitforgrantedthatfamousbrandsmeanhighquality.,eg.Youcandependonitthathewillcomehereontime.,.,ExercisesTime,.,I.单项选择1.Hedidntmake_clearwhenandwherethemeetingwouldbeheld.(天津)A.thisB.thatC.itD.these2._isourbeliefthatimprovementsinhealthcarewillleadtoastronger,moreprosperouseconomy.(浙江)A.AsB.ThatC.ThisD.It,高考实例,.,3.Thedoc