GrammarRevision3Number2013年中考英语专项复习***2013.3.30学习目标1、知道数词的分类及用法2、掌握基数词的形式及读法3、掌握序数词的形式4、掌握分数、小数、百分数读法5、高频考点详解1、知道数词的分类及用法1.分类:2.基数词用法:表示事物数量的多少。如:one,two,fourhundred,…3.序数词用法:表示事物排列先后的顺序(第几)如:first,second,twentieth,twenty-first.在使用序数词时通常前面要加the;但如果序数词前出现不定冠词a、an时则表示“又一再一”数词基数词序数词分数小数百分数2、掌握基数词的形式及读法(1)0-12为基数词,有其各自的形式,是构成数词的重要部分。如:seven,eight,nine,ten,eleven,twelve(2)13-19都以-teen结尾,单词中的两个音节都是重读音。如:thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen(3)20-90十位数的整数都以-ty结尾;21-99在十位与各位之间加连字符号“-”。如:twenty-one,seventy-six(4)三位数数词:百位和十位(若无十位则和个位)之间用and连接,十位和个位间用“-”连接。如:861eighthundredandsixty-one;204twohundredandfour(5)1,000以上的数字,从右往左数,三位一组,每三位数加一逗号“,”;第一个“,”号前为thousand(千),第二个“,”号前为million(百万),第三个“,”号前为billion(十亿)。如:万以上的数字读法特点6,500,431,729hundredthousandmillionbillion注意每三个数为一个单位,按照百、十、个向下读。6,500,431,729sevenhundredandtwenty-ninethousandmillionbillionsixbillion,fivehundredmillion,fourhundredandthirty-onethousand,hundred3、序数词的形式onetwothreefiveeightninetwelvefirstsecondthirdfiftheighthninthtwelfth1st2nd3rd5th8th9th12thtwentytwenty-oneonehundredtwohundredandthirty-ninetwentiethtwenty-firstonehundredthtwohundredandthirty-ninth基数词基数词序数词序数词缩略基变序顺口溜基变序,有规律,词尾加上th。123,特殊记,词尾字母t,d,d;8去t,9去e,f来把ve替;整十y换ie,若是遇到几十几,只把个位变成序,各位牢记别忘记。4、分数,小数,百分数分数:由基数词和序数词合成。分子是1时,分子用基数词,分母用序数词;分子不是1时,分子仍用基数词,分母用序数词的复数形式。如:7/8seveneighths。注意几个常见表达法:1/2a(one)half1/4one-fourtha(one)quarter3/4threefourthsthreequarters半年halfayear一年半oneandahalfyearsoneyearandahalf小数:小数点读point,零读o或zero,小数点后的数字按个位基数词依次读出。0.6zeropointsix百分数:百分数由基数词加percent表示。不论基数词是多少,percent始终用原形。如:0.8%,读作zeropointeightpercent;17%读作seventeenpercent五、高频考点之一——hundred,thousand,million,billion这几个词前有确切数词时,遵循“两个无”原则,即无“s”,无“of”;如:threehundredpeople,ninemillionbooks但是一定注意:如后面是表示总体的人或物,前面的数词是表示总体中的一部分时,要用of。如:sevenhundredoftheworkers这几个词前无确切数词时,则遵循“两个有”原则,即有“s”和“of”。如:manythousandsoftrees,millionsofbirds1.(2004年河北省中考试题)Nine_______poundsaweek?That’sverygood.A.hundredofB.hundredsofC.hundredsD.hundredD3.ofthestudentsaregirls.A.ThreehundredB.ThreehundredofC.ThreehundredD.ThreehundredsofB2.(2012年苏州中考试题)ThechairpersonreceivedaboutthreeapplicationstojointheBlindWatchingClub.A.hundredB.hundredsofC.hundredofD.hundredsA五、高频考点之二——基数词+名词(+形容词)1.“基数词+名词”的合成形容词作定语,中间有连字符“-”,当中的名词用单数。如:aseven-dayholiday,afive-starhotel,a3-daytrip,an800-wordcomposition2.“基数词+名词+形容词”,主要表计量,在名词前做定语时,名词用单数,词中间用连词符号“-”;如:an18-year-oldgirl,women's800-metrerace,an80metrelongbridg注意:在联系动词后作表语时,名词用复数,不用连词符。如:Theclassroomis7meterslong,6meterswideand3metershigh.1.(2011连云港中考试题)--Howamazingthenoodleis!--Yes,itis_______,andbreakstheGuinnessWorldRocordasthelongesthandmadenoodle.A.1704-meter-longB.1704-meters-longC.1704meterlongD.1704meterslongD2.(2012江苏中考试题)Heisonlyboy.Heisn'toldenoughtotakecareofhimself.A.a8-year-oldB.a8-years-oldC.an8-year-oldD.an8-years-oldC1.倍数:表示“一倍”once;表示“两倍”twice;表示“三倍”或“三倍以上”的倍数用times。如:三倍threetimes;常用句型:(1)...数词+times+形容词(副词)比较级+than...如:Thecarrunstwicefasterthanthattruck.(2)...数词+times+as+形容词或副词原级+as...如:Thebigboxissixtimesasheavyasthesmallone.(3)...数词+times+the+名词(size,height,weight,length,width)+of/从句.如:Theearthis49timesthesizeofthemoon.Thisstreetisfourtimesthelengthofthatone.2.分数:“分数(包括百分数)+名词”做主语时,谓语动词的单复数取决于名词,名词为复数,动词用复数;名词为单数或者不可数名词,动词用单数。如:Twothirdsofthebuildingsaretallersthanbefore.五、高频考点之三——倍数和分数1.(2010兰州中考试题)Ithink____ofthematerialsIlistenedtoatthebeginningoftheexam____easy.A.threefourths,isB.thirdfour,areC.threefourths,areD.threefourth,areD2.(2012杭州中考试题)Wehavetwoearsandonemouthsothatwelistenwespeak.A.astwicemuchasB.twiceasmuchasC.asmuchastwiceD.asmuchtwiceasB2.(2011青海中考试题)ofthesandinthatdistrictcoveredwithtreesandgrass.A.Twofifths,areB.TwofifthareC.Twofifth,isD.Twofifths,isD五、高频考点之四——1.编号表示法:(1)编号在前,名词在后,用序数词,前面有the;(2)编号在后,名词在前,用基数词,注意首字母大写;(3)房间号码和电话号码要一个一个分别读。如:第一课TheFirstLesson(句中不大写),LessonOne;Room3052.“几十”的复数形式可以表示:(1)几十多岁----in+one’s+数词复数(inhisforties2)年代---in+the+数词复数inthenineties3.时刻表示法:(1)顺读法,(2)逆读法,(3)aquarter与half4.“每隔“的两种结构:(1)every+基数词+复数名词(2)every+序数词+单数名词。如:每隔三天(每四天)everyfourdays或everyfourthday5.“another+基数词+名词的复数”或者“基数词+more+名词”表示在一定基础上再增加一定的数量。如:twomoreboys=anothertwoboys。6.基数词和序数词的基本用法1.(2012铜仁中考试题)AboutofthestudentsinGradeNinewereborninthe.A.threefive;1996B.threefifths;1990sC.threefifth;1997D.thirdfifths;1990s2.(2012自贡中考试题)---IhearyourfriendisvisitingSanyaagain,Isitthesecondtimeforhim?---Yes,andhewillcomefortimenextspring.A.athirdB.asecondC.thethird3.(2011达州中考试题)---Ifa=4,b=5,what'stheanswertothequestiona+2ab+1=?---.A.Forty-fifthB.Forty-fiveC.Twenty-threeD.Onehundredandtwenty-oneABThankyouforyourlistening!Bye-bye!