中考英语复习基数词和序数词课件

基数词和序数词范围特点实例1-12无规律one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve13-19以teen结尾thirteen,fourteen,fifiteen,sixteen,seventeen,eighteen,nineteen20-90以ty结尾twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety21-99十位与个位之间要加连字符"-"twenty-five,sixty-five,forty-nine101-99百位与个位之前通常要用andthreehundredandtwenty-five(美语中常将and省略）千以上6275sixthousandtwohundredandseventy-five;1200twelvehundred（onethousandtwohundred)155,721onehundred(and)fifly-fivethousandsevenhundred(and)twenty-one基数词构成表基数词：表示数目/数量1范围特点实例1-19各基数词词尾加thfour--fourth,six--sixthnineteen--nineteenth七个例外one--first,two--second,three--third,five--fifth,eight--eighth,nine--ninth,twelve--twelfth20,30-90把y改i之后加ethtwenty--twentieth,forty--fortiethninety--ninetieth21以后多位数最后一个数用序数词，其余用基数词第21-twenty-first,第110-onehundredandtenth序数词构成表序数词：表示事物的顺序2基数词变序数词的口诀（规律）3

基变序，有规律，一般词尾th。一二三，特殊记，词尾字母ddt(third，second,first)。八减t(eighth),九去e(ninth)，f来把ve替(five-fifth,twelve-twelfth)。若是ty作结尾，ty就变tie，最后再加th(twenty-twentieth)若是碰到几十几，只变个位就可以。

第一百、第一千、第一万、第一百万、第十亿都是在基数词后面直接加th构成。如：hundred-hundredth,thousand-thousandth

序数词的缩略形式是由阿拉伯数字㘡序数词的最后两个字母构成。如第25，twenty-fifth=25th

序数词前面要加定冠词

如：Sheisalwaysthefirstonetoarriveattheoffice.基数词的一般用法基数词的用法3

表示年、月、日2008年12月25日：December25th,2008读作：Decemberthetwenty-fifthtwothousandandeight12个月：twelvemonth11天：elevendays15岁:fifteenyearsold

表示时刻8:21读作twenty-onepasteight/eighttwenty-one7:30读作halfpastseven/seventhirty14:50读作fourteenfifty/tentofifteen16:00读作sixteeno’clock/sixteen基数词的一般用法基数词的用法3

表示编号第12号：Number12读作numbertwelve第211页：Page211读作pagetwohundredandeleven

表示算式5+6=11读作fiveandsixiseleven11-5=6读作elevenminusfiveissix

表示小数1.2读作onepointtwo0.09读作zeropointzeronine

表示分数（分子用基数，分母用序数，分子大于1，分线用复数）1/2读作a/onehalf1/8读作an/oneeighth(a/an更倾向于口语化）1/4读作：a/onequarter(fourth)2/3读作：twothirds1-5/9读作oneandfiveninths基数词变复数的般用法基数词的用法4

与of短语连用，表示大概的数量，不能与具体数目连用。如：scoresofpeople指许多人hundredsofpeople数以百计的人

表示一排或者一组的词组里面，如：Theyarrivedintwosandthrees.他们三三两两地到了。

表示“几十岁”in90s在九十岁时

表示“年代”，用in+the+数词复数inthe90s/1990s在九十年代

在乘法运算的一种表示法里，如3x5=15Threefivesis/arefifteen.2x6=12Twosixsis/aretwelve.

表示地址。英语里面,街道的号码是放在街道名称的前面,楼号和单元号是被放在它们的后面的,而生活区是放在地址的后部.

序列是从小到大（单元到生活区）。例如：黄浦区北京路1号,1号楼1单元1号房会写为：Room1,Unit1,Building1,1BeijingRoad,HuangpuDistrict.或Room#1,Unit#1,Building#1,1BeijingRoad,HuangpuDistrict.序数词的一般用法序数词的用法5

表示日期3月8日March8th读作Marchtheeighth1986年9月1日September1st,1986/1stSeptember,1986

表示分数（分子用基数，分母用序数，分子大于1，分线用复数）1/6onesixth3/5threefifths 3/37threethirty-seventh1/3onethird2/3twothirds

表示楼层

。地面之上的部分，序数词+floor但是英美习惯不同，Britishconvention有Groundfloor第一层，再上一层是firstfloor，Americanconvention通常不使用Groundfloor，第一层就是firstfloor，再上一层是secondfloor。

表示顺序的时候，基数词和基数词可以互换。如：Lessonfive=thefifthlessonClassfive=thefifthClass

Gradefive=thefifthGrad

hundred,thousand,million等百，千，万的词有两种用法：1.做名词时加s,后面与of连用。表示非准确数。如hundredsofstudents数以百计的学生2.hundred作形容词时不用加s,前面加基数词，如twohundredstudents.两百个学生

分数作主语时,谓语动词用单数还是复数1.单纯的分数做主语时，无论其大小，谓语都要用单数形式1）Onethirdisbiggerthanonequarter.（三分之一多于/大写四分之一。）2）Twoandthree-tenthsequqlstwopointthree.（二又十分之三等于二点三。）重点：62.如果是分数修饰名词作主语时，谓语动词的单复数取决于这个名词是否可数1）如果是不可数名词，则谓语动词用单数。例如：One-thirdofthewaterinthisriverispolluted.这条河里面的水，三分之一都被污染了2）of后面是可数名词单数，则谓语动词用单数。例如：Twothirdsofthedeskispaintedred.thedesk3）of后面是可数名词复数形式，则谓语动词也用复数形式One-thirdofthestudentsaregirls.（这些学生中三分之一是女生。）

当分数词修饰population时，则谓语动词一律用复数形式。如：SevententhsofthepopulaitoninChinaarefarmers.

重点：6练习1.About

ofthebooksinourschoollibraryarewritteninChinese.A.fourfifth B.fourfifths C.fourthfifths D.fourthsfifth2.Heis

inourclass.A.thefourthtallest B.fourthtallest C.fourtallest D.thefourtallest3.HowmanypeoplewillcometoBeijingnextyear?It’shardtosay.

people,Ithink.A.Millionof B.Millionsof C.Millions D.million4.Inourclass,

ofthestudents

girls.A.threefifths,are B.threefifth,are C.threefifths,is D.threefifth,is5.About

filmswereshownduringthe5thShanghaiFilmInternationalFestival.A.twohundredof B.twohundredsof C.twohundred D.twohundreds6.Theboyalwaysstaystherefor

.A.oneandhalfhourB.oneandahalfhourC.oneandhalfhoursD.oneandahalfhours7.Hesaidhewasgoingtobefreein

.A.oneandahalfhourB.onehourandhalfC.oneandhalfhoursD.anhourandahalf练习8.Plsturnto

.A.Page11 B.the11stpage C.page11 D.pagethe11th9.

oftheworkersinthisfactoryisabouttwohundred.

ofthemarewomenworkers.A.Thenumber;Firstthird B.Thenumber;onethirdC.Anumber;half D.Thenumber;threequarters10.Wherearethestudents?Aretheyin

?A.theRoom406 B.Room406 C.the406Room D.406Room11.Howlongistheriver?It’s

metres.A.aboutthreehundredandseventeen B.abouttwohundredsandforty-fiveC.morethantwohundredsD.lessthanthreehundredsandseventy12.Canyouwritethenumbereighty-fivethousand,sixhundredandtwenty-six?Yes,itis

.A.85662 B.85626 C.58662 D.5862613.Mayis

ofayear.A.thefifthmonty B.thefivemonthsC.thefifthmonthsD.thefivemonth练习14.Welivein

.A.thetwenty-firstcentury B.thecenturytwenty-oneC.centurytwenty-one D.thecenturytwenty-first15.Mr.Smithstayedin

lastnight.A.Room403 B.theRoom403 C.the403room D.403theroom16.Shesaidshewasgoingtocomebackin

.(选择两个正确答案）A.twoandahalfhours B.twohoursandhalf C.twoandhalfhours D.twohoursandahalfE.twohourandahalf17.Theroadis

.A.twothousandandfivehundredmetreslong B.twothousandsmetreslongC.longonethousand D.athousandandfivehundredsmetreslong18.Hejoinedthearmyon

ofMay1980.A.1st B.the1 C.first D.thefirst练习19.Atnightwecansee

starsinthesky.A.thousandsandthousandsof B.thousandandthousandsof

C.thousandandthousandsD.thousandandthousand20.Thereare

studentsinourschool.A.four-hundrendandforty-five B