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a,an,the的用法讲解及练习冠词是虚词，本身不能单独使用，也没有词义，它用在名词的前面，帮助指明名词的含义。英语中的冠词有三种，一种是定冠词（theDefiniteArticle），另一种是不定冠词（theIndefiniteArticle），还有一种是零冠词（ZeroArticle）。an,/a是不定冠词，仅用在单数可数名词前面，表示“一”的意义，但不强调数目观念。a用在以辅音（指辅音音素）开头的词前，an用在以元音（指元素音素）开头的词前。the是定冠词，修饰特指名词，翻译成“这个”。如果泛指某物,用a/an,具体指某物的话，用the.注意：（1）当我们使用an时，条件有三：①这个名词的读音必须是以元音音素开头--即它的音标的第一个音素是元音，而不是说它是以元音字母开头。②它必须是个可数名词。③它还必须是个单数名词。我们常常见到这类用法：anuniversity一所大学;anhour一个小时;anorange一只桔子anengineer一位工程师anordinaryman一个普通人anhonestperson一位诚实的人（2）定冠词在句子中，既可以用于可数名词前，也可以用于不可数名词前；既用在可数名词的单数形式前，也用在可数名词的复数形式前。从表达意义上讲，它既可表达this,that之意义，也可表达these,those之意义。一．不定冠词的用法：1．用于可数名词单数前，表示某一类人或事物。Thisisaruler.He’sastudent.2．指人或事物，但不具体说明何人或何物。Therearesevendaysinaweek.Wehavethreemealsaday.3．表示“一个”，但数的概念没有one强。There’satreeonthehill.Hehasaninterestingbook.4．指某类人或事物中的任何一个。Anelephantisbiggerthanahorse.Acarrunsfasterthanabike.用于某些固定词组中。alotof\abit\havearest\haveacold\akindof\apieceof\haveagoodtime6.首次提到的人或物。二.定冠词的用法（1）特指某（些）人或某（些）事物。例如：Thebookonthedeskismine.（2）指双方都知道的人或事物。例如：Openthedoor,please.请开门。（3）用在世界上独一无二的事物前。例如：Thesunisbiggerthanthemoon.太阳比月亮大些。但这些名词作为描绘性定语时，可用不定冠词。例如：Look!Aredsunisrising.瞧！一轮红日正在升起。（4）用在序数词和形容词最高级前。例如：Thefirstislandisthebiggestofthethree.第一个小岛是三个中最大的。（5）用在用普通名词构成的党派，国家等专有名词以及江河、海洋、山脉、群岛、海峡、海湾等专有名词前。例如：TheywillvisittheGreatWallnextweek.（6）用在形容词前表示一类人，the+形容词指的是一群人，是一种复数含义，所以其后动词应用复数形式。例如：Theoldaresick.（7）用在姓名复数形式前表示一家人。例如：TheSmithshavemovedtoLondon.（8）用在某些习惯用语中。例如inthemorning,ontheleft,thedaybeforeyesterday,allthesame(9)弹奏西方乐器前面要用定冠词，东方乐器则不用。例如：Playthepiano,playErhu三．零冠词即不用冠词的情况：1．专有名词和不可数名词：China,ClassOne如特指可与冠词连用。2．泛指的复数名词前:Booksaremybestfriend.3．在星期(onMonday)、月份(inMarch)、季节(inSummer)、节日(inChristmas)前4．一日三餐(havebreakfast)、球类(playbasketball)、学科(maths)、语言(inEnglish)名词前5．职务、头衔、称呼前:Doctor,Iamnotfeelingwell.6．名词前已有指示代词、物主代词或不定冠词时7．在某些固定短语中I.在下列句中空白处填入适当冠词，不需用冠词处划/。1．Thereis__pictureof___elephanton__wall．2．Thisis___usefulbook.I'vereaditfor__hour．3.___elephantismuchheavierthan___horse．4.___doctortoldhimtotake__medicinethreetimes___day.5．Let'sgooutfor_______walk．6．It'stoohot．Open_______door，please．7．Thereis___womanoverthere.____womanisMeimei'smother．8．_______sunrisesin_______east．9．_____ChangjiangRiveris_____longestriverin___China．10．Areyougoingtodoit_______secondtime？11．Washingtonis_______capitalof_______USA．12．___Turnersarelivingattheendof___TurnerStreet．13．Hejoinedthearmyin___springof_____1995．14．____oldmanis_____teacher．Helikesplaying____basketballafter____supper．15．AfterIhad_____quickbreakfast，Ihurriedtoschool．16．Are____sheepkeptby___farmersforproducing___wooland_____meat？17．Theywentto___People'sPark,butwebothwentto_____People'sCinemayesterday．18．Ioftenwatch_______TVin_______evening．19．_______dayof_____December20，1999isMonday．20．Tomorrowis_______ChristmasDayandmyfatherandIwenttochoose_______Christmastreetoday．21．Ithink____mathsismoreimportantthananothersubject．22．Heoftengoesto_______schoolby_______bike．23．Whatdoesthis_______wordmean，_____Father？24．What_______importantnews！II.选择填空。1．—DoesJimhave_______ruler？—Yes，hehas_______．A．an；someB．a；oneC．a；／D．any；one2．Thereis_____oldbike．_____oldbikeisMrZhao's．A．an；TheB．the；AnC．a；TheD．the；The3．____appleadaykeepsthedoctorsaway．A．TheB．AC．AnD．Two4．—Howmanybooksdoyouhave？—Ihave_____book．That's_____Englishbook．A．a；anB．a；oneC．one；anD．one；one5．AtthattimeTomwas_______one-year-oldbaby．A．aB．anC．theD．／6．_______tigeris_______China．A．The；aB．A；theC．The；fromD．The；the7．Wecan'tsee_______sunat_______night．A．the；theB．the；／C．a；／D．／；／8．_______usefulbookitis！A．WhatanB．HowaC．WhataD．What9．Oneafternoonhefound_______handbag．Therewas_______“s”onthecornerof_______handbag．A．a；an；theB．a；a；theC．an；an；anD．the；a；a10．_______oldladywithwhitehairspoke_______Englishwellat_____meeting．A．An；an；aB．The；／；anC.The;／;aD．The；／；the11．____GreatWallis___longestwallintheworld．A．A；aB．The；theC．A；theD．The；a12．___newbridgehasbeenbuiltoverHuangpuRiver．A．The；aB．A；／C．A；theD．An；the13．____womanoverthereis____popularteacherinourschool．A．A；anB．The；aC．The；theD．A；the14．Heusedtobe____teacherbutlaterheturned_____writer．A．a；aB．a；theC．／；aD．a；／15．Theymadehim_______king．A．aB．theC.anD．／16．Hisfatheris_______Englishteacher．Heworksinourschool．A．aB．anC．theD．／17．Ishe_______Americanboy？A．anB．aC．oneD．／18．DoesTomoftenplay_____footballafter____school？A．／；／B．／；theC．the；／D．a；／19．Theypassedourschool____daybeforeyesterday．A．anB．oneC．aD．the20．Australiais_______English-speakingcountry．A．aB．anC．theD．／21．Shehas_______orangeskirt．___skirtisnice．A．a；TheB．an；TheC．an；AD．the；The22．Thisis_______apple．It's_______bigapple．A．an；aB．a；theC．a；anD．an；the23．Lookat_______horseoverthere．A．aB．anC．theD．／24．Don'tplay_______basketballhere．It'sdangerous．A．aB．anC．／D．the25．Thereis_______oldwomaninthecar．A．／B．theC．aD．an26．Beijingis_____beautifulcity.It's____capitalofChina．A．a；aB．the；theC．／；theD．a；the27．Shanghaiisin_______eastofChina．A．／B．anC．aD．the28．I'vebeenastudenttherefornearlytwoand_______halfyears．A．aB．anC．theD．／29.Billis_____Englishteacher．Helikesplaying_____football．A．a；theB．an；theC．a；／D．an；／30．Themuseumisquitefar．Itwilltakeyouhalf__hourtogetthereby