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年月周前要用in，日子前面却不行。遇到几号要用on，上午下午又是in。要说某日上下午，用on换in才能行。午夜黄昏须用at，黎明用它也不错。at也用在明分前，说“差”可要用上to。说“过”只可使用past，多说多练牢牢记。【知识梳理】一、介词(prep.)含义：表示它后面的名词或代词与其他句子成分的关系。介词分类：时间介词；方位介词；方式介词介词短语：介词+名词;动词+介词；be+形容词+介词二、表示方位的介词：1.in,to,on（1）in表示在某一地区之内的某方位（属于该范围）；FujianisinthesoutheastofChina.（2）to表示在某一地区之外的某方位（不属于该范围）；JapanistotheeastofChina（3）on表示与某地的毗邻关系KoreaisontheeastofChina.2.over,above和on（1）over指在......正上方，表垂直在上。Thereisabridgeovertheriver.（2）above指在上方，属于斜上方。Raiseyourarmsaboveyourhead（3）on指在上面，表两物体接触。Thereisaplateonthetable.3.at,in和on的用法区别（1）at表示较小的地方。atthebusstop,athome（2）in表示较大的地方。inChina,intheworld（3）on表示在一个平面上。onthetable4.(1)infrontof在......之前（范围外）。Therearesometreesinfrontoftheclassroom(2)inthefrontof表示“在......的前部”（范围内）Ourteacherusuallysitsinthefrontoftheclassroom.(3)before所表示的位置关系和infrontof通用，表示“在......前”，“在......面前”5.below,under（1）below表示“在下方或位置低于......”，不一定有垂直在下之意；(2)under表示“在......正下方”。Therearemanybikesunderthetree.Thecoatreachesbelowtheknees.【例1】Theboatispassing___thebridge.A.throughB.belowC.underD.across【例2】Twoplanesareflying___thecity.A.throughB.over,C.on,D,below【例3】Wecanseeariverrunningtotheeast____thehill.A.underB.belowC.overD.on【例4】Doyouseethekite___thebuilding.A.overB.crossC.onD.above【例5】Isthestreettoonarrowforthebustogo___?A.throughB.acrossC.onD.in【例6】Amothercamelwaswalking___herson___thedesert.A.without;alongB.with;throughC.nextto;passD.beside;through【例7】Theriverruns____thecity.A.acrossB.throughC.overD.from【例8】Ittookusoveranhourtowalk____thisstreet.A.fromB.throughC.overD.across【例9】--WhenwillMr.BlackcometoBeijing?--____September5th.A.OnB.ToC.AtD.In【例10】____thenightbeforeChristmasDay,parentsfilltheirchildren’sstockingswithsmallpresents.A.OfB.AtC.ToD.On【例11】Therearesomebirdssinging___thetrees.AinB.onC.atD.from【例12】Therearesomanyapples___thattree.A.inB,onC.atD.from【例13】TheUnitedStatesis____thesouthofCanadaand___theeastofJapan.Ato;inB.on;toC.in;besideD.at;on【例14】___research___theuniversescientistshaveputalotofinformation___computers.A.With;over;atB.On;at;toC.In;about;intoD.For;with;through【例15】Whenapieceoficeistaken____awarmroom,itgetssmallerandsmalleruntil___theenditdisappearscompletely.A.in;inB.outof;atC.into;inD.to;by【课堂练习】：1.WetraveledovernighttoParisandarrived_______5o’clock______themorning.A.on;inB.at;inC.at;onD.in;on2.JackhasstudiedChineseinthisschool_______theyearof2000.A.sinceB.inC.onD.by3.HongKongis______thesouthofChina,andMacaois______thewestofHongKong.A.in;toB.to;toC.to;inD.in;in4.Japanlies______theeastofChina.A.toB.inC.aboutD.at5.Iwon’tbelievethatthefive-year-oldboycanreadfivethousandwords______Ihavetestedhimmyself.A.afterB.whenC.ifD.until6.Thebookwassointerestingthathehadreaditforthreehours______herealizedit.A.whenB.untilC.afterD.before7.Look＿＿＿themap＿＿＿China＿＿＿thewall,please.Aafter,of,inBat,of,inCafter,in,onDat,of,on8.-Pleaseremembertocometomybirthdayparty.-Isee.I'llcome＿＿＿Saturdayevening.AinBatConDfor9.Theywillhaveamathstest＿＿＿twodaysAforBatCinDafter10.Mybrotherjoinedthearmy＿＿＿A1989，MarchBinMarch，1989CMarch，1989D1989，inMarch11.It'sgoodmannerstowait＿＿＿lineAinBonCatDwith【课后作业】1.Wehadourbreakfast＿＿＿aquarter＿＿＿sevenA/，toBin，toCat，toDon，to2.It'sgoodmannerstowait＿＿＿lineAinBonCatDwith3.HowmanyEnglishwordshadyoulearnt＿＿＿lastterm?AbytheendofBattheendofCtotheendofDtilltheendof4.Iwasborn＿＿＿thenight＿＿＿September15，1978Ain，onBat，onCat，inDon，of5.It'sabadmannertolaugh＿＿＿peoplewhentheyare＿＿＿troubleAover，inBat，inCin，atDat，for6.Thepeople'sRepublicofChinawasfounded＿＿＿1949AwithBonCsinceDin7.Hearrived_____Guangzhou____noon.A.in;inB.to;atC.in;atD.at;in8.Theywork_____asmallfarm_____ariver.A.on;byB.at;onC.by;onD.in;in参考答案：例题CBBDABBBADABBCC课堂练习BAAADDDCCBA课后作业CAADBDCA