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Book6Unit3AhealthylifeGrammar:Theuseof“it”中天高中李倩倩Lead-inititititDiscover“it”inthetextPara.1,2Itisabeautifuldayhere.Itseemsamazingthatatmyage…It’smybirthdayintwoweek’stime.Nowyouarefindingitdifficulttogiveitup.Iknowhoweasyitis…andhowtoughitis…Para.3Para.4,5Lead-inThismeans…havingnicotineinit.Ifyoudo…,youbegintodoitautomatically.Soitwasverydifficulttoquit.Itcoulddoterribledamagetoyourheart.Itwasmoredifficultforsmokingcouplesto…Iknewitwastimetoquitsmoking.Itmighthelpyoutostopandstrengthen…人称代词人称代词人称代词人称代词人称代词形式主语人称代词形式宾语形式主语形式主语形式主语习惯用法Theuseof“it”指代前面的名词或提到过的事指代性别不明的child或baby指代未出场的身份不明确的人指代时间、距离、自然现象、环境、情况等指代指示代词this/that人称代词Whataretheuseofit?_______1.—What’sthis?—It’sakindoffood._______2.—Whoisknockingatthedoor?—Itmightbethemilkman._______3.Thissuitcaselooksheavybutactuallyitisverylight._______4.Itistwomilestotheislandfromhere._______5.Mysister-in-lawgavebirthtoababy;itweighs4kg.53124Theuseof“it”形式主语1.做形式主语it可以用作先行词作为句子的主语,而把句子的真正主语移到后面去,可以移到后面的主语是：1)不定式2）动名词3）that从句常用句型1.Ittakessb.sometimetodosth.2.Itbe+adj.+todosth/that…3.Itbe+n.+todosth/that…4.Itbe+adj./n.+doingsth5.Itbe+过去分词+that…0900018765432150004987654321039876543210987654321021987654321098765432100HoursMinutesSecondsMemorizeasquicklyaspossibleIttook/takes/willtakesb.Sometimetodosth…敢不敢再难一点！(他花了3个小时才做完作业)Ittookhim3hourstofinishhishomework.Itistoughforthemtoquitdrinking.Itis+adj+todosth/that…好喝！(对他们来说戒酒很难)Itisawondertoseesuchabighenploughing.(看到如此大的一只母鸡耕地是一个奇迹)Itis+n+todosth/that....母鸡：hen耕地：ploughItisnouse/nogood/awasteoftimedoingsth.It’snogoodbeingaddictedtoplayingcomputergames.再玩一会就去睡觉……(沉迷于游戏没有一点儿好处)Itbe+过去分词+that…据……ItisreportedthatthreeairportswillbebuiltinJinhua.看！灰机！(据报道，金华将要建造三个机场)Theuseof“it”形式宾语当复合宾语中的宾语是不定式、动名词、宾语从句时,往往用it作形式宾语，把宾语放在它的补足语后面，常用于此结构的动词有：make/think/feel/find/consider/believe/discover等常见形式1.thinkit+adj./n+todosth/that从句IthinkitveryinterestingtolearnEnglish.2.thinkitnouse/useless/nogooddoingIthinkitnousearguingwithhim.注意：某些动词不能直接跟宾语从句，须先接it作形式宾语，常见的有：like,appreciate,dislike,hate等3.v.+it+when/if从句Ilikeitwhenmymotherwashappy.Itis/wasnotuntilthat…Theuseof“it”强调句基本形式Itis/was+被强调部分+that/who+剩余部分一般疑问式Is/Wasit+被强调部分+that/who+剩余部分特殊疑问式疑问词+is/wasitthat/who+剩余部分not…until..强调句型PracticeLucymetJackinthestreetyesterday.基本形式:一般疑问式:特殊疑问式:not…until..强调句型:ItwasyesterdaythatLucymetJackinthestreet.WasityesterdaythatLucymetJackinthestreet?WhenwasitthatLucymetJackinthestreet?ItwasnotuntilyesterdaythatLucymetJackinthestreet.Theuseof“it”习惯用法1.Icanmanageit.我能行。2.Ican’thelpit.我没办法。3.Gotit.我明白了。4.Makeit成功Theuseof“it”习惯用法1.Itbe+时间段+since…2.Itbe+时间段+before…3.Itis/was+时间+when定语从句4.Itis/was+thefirst/second…timethat…训练案1.D2.D3.A4.C5.D6.C7.A8.C9.B10.C11.A12.D13.D14.A15.C---Doyoulike_____here?---Oh,yes.Theair,theweather,thewayoflike.Everythingisnice.A.thisB.theseC.thatD.it解析：here为副词，不能做宾语，所以用it指代Someoneisringingthedoorbell.Goandsee_______.A.whoisheB.whoheisC.whoisitD.whoitis解析：代词，指代未出场的身份不明确的人We’vebeenlookingatthehousesbuthaven’tfound_______welikeyet.A.oneB.onesC.itD.them解析：one指代与前面同类不同一事物表泛指，这里指代“还没找到我们喜欢的一所房子”；ones为one的复数；it指代同名同物；them指代前面提到过的复数名词；I’mmovingtothecountrysidebecausetheairthereismuchfresherthan_______inthecity.A.onesB.oneC.thatD.those解析：tha和one均指代同名异物，that表特指，一般用来指代the+名词，one表泛指。这里指代城里的空气，是特指，所以用thatTheForeignMinistersaid,“_______ourhopethatthetwosideswillworktowardspeace.A、ThisisB、ThereisC、ThatisD、Itis解析：it作形式主语，指代后面的that从句_______intheregulationsthatyoushouldnottellotherpeoplethepasswordofyoure-mailaccount.A.WhatisrequiredB.WhatrequiresC.ItisrequiredD.Itrequires解析：it作形式主语，指代后面的that从句Itisno_______arguingwithBillbecausehewillneverchangehismind.A.useB.helpC.timeD.way解析：It’snousedoingsth.Hedidn’tmake_______clearwhenandwherethemeetingwouldbeheld.A.thisB.thatC.itD.these解析：it作形式宾语，指代后面的宾语从句.--Don’tyouthinkitnecessarythathe____toMiamibuttoNewYork?--Iagree,buttheproblemis____hehasrefusedto.A.willnotbesent;thatB.notbesent;thatC.shouldnotbesent;whatD.shouldnotsend;what解析：thinkitnecessarythat后用虚拟语气should+动词原形，第二句表语从句为省略句，句子完整用that引导Ilike_______intheautumnwhentheweatherisclearandbright.A.thisB.thatC.itD.one解析：某些动词不能直接跟宾语从句，须先接it作形式宾语，常见动词有：like/appreciate/dislike/hate等Why!Ihavenothingtoconfess._______youwantmetosay?A.WhatisitthatB.WhatitisthatC.HowisitthatD.Howitisthat解析：强调句的特殊疑问句形式：特殊疑问词+is/wasitthat….It__wehadstayedtogetherforacoupleofweeks_______Ifoundwehadalotincommon.A.was;whenB.wasthat;thatC.wasn’tuntil;whenD.wasn’tuntil;that解析：Itis/wasnotuntilthat–--Wheredidyougettoknowher?–--Itwasonthefarm_______weworked.A.thatB.thereC.whichD.where解析：答句省略了thatIgottoknowher,所以____weworked并不是强调句，而是定语从句，用where引导----Whomadesuchastupidmistake?----_______Tom.A.ItwasB.HewasC.ThatwasD.Therewas解析：答句为强调句，完整回答为ItisTomwho/thatmadesuchastupidmistake.Itisnotwhoisrightbutwhatisright_______isofimportance.A.whichB.itC.thatD.this解析：强调句，翻译为“重要的不是谁是对的而是什么是对”。ABItiswhatyoudoratherthanwhatyousaythatmatters.A.whichB.itC.thatD.thisAB