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I.Articles(冠词)一．下列情况只能用“a/an”1．表示“一”Thereisapenonthebook.2．第一次提到Hesawawalletlyingontheground.3．泛指Aboycandoitwell.4．表一类：Ahorseisuseful.5．惯用法inahurry6．其他用法abetterjob,anicestboyasecondtimeahotFriday7．不可数名词前有形容词修饰时：a．big/heavyrain/snow;a．bigsupperagreatsuccess有一些不可数名词加了形容词后仍不能加不定冠词（weathernewsfunadvice,progress等）8.用在姓名、作品前，表示“具有……特征的人”、“……的作品”egIwishtobecomeanEdison.TheyhaveaPicassointheirlivingroom.用在带姓的名字前，表示一位姓。。。的小姐或先生如：AMissChencametoseeyouthismorning.9.用在be+n+of+a+n的结构中表示不同事物的共同性。Birdsofafeather,carsofakind二．下列情况只能用“the”1．第二次提到YesterdayIsawafilm.ThefilmisdirectedbyZhangYimou2．表特指Wherehaveyouputthekey?3．最高级但astrongestboy4．序数级（单独用）thefirst,thelast但又一次：如asecond5．有后置定语修饰时（含从句）thescienceoflife;theboyintheroomthebalanceofnature6．独一无二的事物前thesuntheearth但a．risingsun;a．palemoon，insocietyinnatureinspace7．表一类与一种的④相同。Thehorseisuseful.horses8．乐器前thepianotheviolin9．固定搭配inthemorningthemomenttheminute10．表示一类人的形容词前therich/poor/injured/wounded11．表一家人theSmiths12．由普通名词组成的专有名词前ThePeople’sRepublicofChina13．沙漠、河流与群山，组织、党派和机关，书名杂志及报刊，定冠词不能删theTongtingLake(LakeTongting),theUnitedStates,theTimes14．有后置定语修饰的地名/人名前加the(专有名词转化为普通名词)theChina/theShaoxingofthetwentiethcentury/HeistheNewtonoftheage.15.对两人或两物进行比较时，起特定作用的比较级前egHeisthetallerofthetwochildren.16.在发明物的单数前thecompass17.及物动词+宾语+介词+the+身体的部位catchhimbythearm18.用在历史朝代前theSongDynasty19.在以sh/ch/ese/结尾的表示国家和民族的形容词前the，表示这个国家和民族的全体人员。theFrench20.与表示计量单位的名词连用，含有“每”bythedozen/hour/pound三．下列情况既不用a也不用the1．季节前，月份,星期，节假日前，inspring但inth．espringof1989,intheyear20002．表一类，Horsesareuseful.3．棋类，球类playChinesechess4．三餐前但a．richlunch5．固定搭配atonce6．学科前English但th．eEnglishlanguage7．抽象名词前但th．ebalanceofnaturethescienceoflife8．官衔，军衔前hewasmadeheadmaster(补)但Smith,th．eheadmaster（同位语）iscoming.9．Turn动词后，turndoctor10.as/though前移的让步状语从句中。11．在语言的名词前如：English但theEnglishlanguage12．在表示职位、职称、头衔的名词前Mr.Cookhasbeenelectedheadmasteroftheschool.练习：1.Suzhouiscomparedto______VeniceofChina.A./B.aC.anD.the2.Yesterdaywas______Children’sDay.A.aB.anC./D.the3.Whichdoyouthinkis______ofthetwo,Canada,ortheUSA?A.largerB.thelargerC.largestD.thelargest4.Shesaidtherewasno______thing.A.suchaB.suchC.asuchD.soa5.Tomowns______largercollectionof______booksthananyotherstudentinourclass.A.the;/B.a;/C.a;theD./;the6.Themostimportantthingaboutcottoninhistoryis______partthatitplayedin______IndustrialRevolution.A./;/B.the;/C.the;theD.a;the7.Thewilsonslivein______A-shapedhousenearthecoast.Itis______17thcenturycottage.A.the;/B.an;theC./;theD.an;a8.Foralongtimetheywalkedwithoutsaying______word.Timwasthefirsttobreak______silence.A.the;aB.a;theC.a;/D.the;/9.Itis______worldofwonders,______worldwhereanythingcanhappen.A.a;theB.a;aC.the;aD./;/10.______on-goingdivisionbetweenEnglish-speakingCanadiansandFrench-speakingCanadiansis______majorconcernofcountry.A.The;/B.The;aC.An;theD.An;/11.---ThenewsthathehasbeenadmittedtoBeijingUniversityisspreadingfrommouthtomouth.---Yes,it’sbecome______talkof______town.A.a;aB.the;/C.the;theD.a;/12.Ifyoubuymorethanten,theyknock20penceoff______.A.apriceB.priceC.thepriceD.prices13.Whilehewasinvestigatingwaystoimprovethetelescope,Newtonmade______discoverywhichcompletelychanged______man’sunderstandingofcolor.A.a;/B.a;theC./;theD.the;a14.Whenyoufinishreadingthebook,youwillhave______betterunderstandingof______life.A.a;theB.the;aC./;theD.a;/15.Many______astronautwantstobe______secondYangLiwei.A.a;theB.an;aC./;aD.a;a16.Doyouknow______artinthe18thcenturyplayed______moreimportantpartinpeople’slivesthanitdoestoday?A.an;theB./;aC.the;aD.the;the17.Doyouknow______speakerof______ChineselanguagealsohasdifficultyinlearningJapanese?A.the;theB.a;theC./;theD.the;/