英文基数词序数词的表达和用法

数词Numerals表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。2•1基数词（cardinalnumber）1one2two3three4four5five6six7seven8eight9nine10ten111213141516171819eleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteen2030405060708090100twentythirtyfortyfiftysixtyseventyeightyninetyonehundred基数词的构成1）1－12,独立成词。onetwothreefourfivesixseveneightnineteneleventwelve2）13--19,由3－9+teen构成。14–fourteen16--sixteen17--seventeen19—nineteen特殊拼写:13–thirteen15--fifteen18—eighteen3）20－90,以-ty结尾。20—twenty30---thirty40—forty50—fifty60---sixty70---seventy80---eighty90—ninety4）21－99，两位数，十位与个位之间有“-”。21twenty-one55fifty-five99ninety-nine5）101—999，三位数，百位与十位/个位之间加and。101onehundredandone840eighthundredandforty693sixhundredandninety-three5297hundredand基数词的构成6twenty-nine729hundredseven035hundredand再来一个7three503hundredfive基数词的构成8hundred百位数十/个位数fourhundredthirty-twoonehundredseventyeighthundredsixty-fiveonehundrednine109432170865作业339126203451704178926854703151309326703651307428注：1、1000以上几个的词，每三位数加一个逗号，第一个逗号前的数为thousand，第二个逗号前的数为million（百万）,第三个逗号前的数为billion（十亿），第四个逗号前的数为trillion（万亿）888,888，888，888，888eighthundredandeighty-eighttrillion,eighthundredandeighty-eightbillion,eighthundredandeighty-eightmillion,eighthundredandeighty-eightthousand,eighthundredandeighty-eighttrillion[ˈtrɪljən]万亿billion[ˈbɪljən]十亿million[ˈmɪljən]百万thousand['θaʊznd]千hundred[ˈhʌndrəd]百29,43150076,,thousand,hundredmillion,billion,and6)1，000以上数目,从右向左每三位用“，”分开,分别读为thousand,million,billion千百万十亿基数词的构成12基数词的构成6500431729sixfivehundredfourhundredandthirty-onesevenhundredandtwenty-ninefourthousand,threehundredandtwenty-onesevenmillion,sixhundredandfiftyfourthousand,threehundredandtwenty-one7,654,3211,987,654,32143214,321onebillion,ninehundredandeighty-sevenmillion,sixhundredandfifty-fourthousand,threehundredandtwenty-one1.hundredthousand(表示具体数字)millionbillion2.hundredsthousands(表示概数)millionsbillions三.基数词的用法数词(several)++ofhundredsof基数词的用法1、表示具体数目,hundred,thousand,million不用复数表示不确定数目,用复数。即hundredsof(数百),thousandsof(数千),millionsof(数百万)+名词复数。1)Ourcountryhasapopulationof1,300millionpeople.2)Thereareseveralthousandstudentsinourschool.3)Afterthewar,thousandsofpeoplebecamehomeless.作业704653421017834679012543213074283216547670465342181703467931204321309428320654warmingup1._______tresswereplantedonthemountainlastyear.A.ThousandsofB.ThousandofC.FivethousandofD.Fivethousands.2．______ofthestudentsaregirlsinourclass．A．TwothreeB．TwothreesC．TwothirdsD．Secondthree3.----Whenwasheborn?----Hewasbornon________.A.secondofOctoberB.theOctoberthreeC.OctoberthesecondD.threeofOctober181.—Ifa=3,b=4,what’stheanswertotheproblem,a+2ab+1=?—theansweris___.A.twentyeightB.twenty-eighthC.twenty-eight2.Inourschoolaboutfive__studentsareabletosurftheInternet.A.hunderdofB.hunderdsofC.hundred3.__sheepwerekilledintheaccident.A.ThousandofB.ThousandC.Thousandsof4.Thereareovernine__workersinthefactory,but__ofyoungpeoplehopetoworkinit.A.hundred0f;hundredsB.hundred;hundredsC.hundreds;hundred5.peopleintheworldaresendinginformationbye-maileveryday.A.SeveralmillionB.ManymillionsC.SeveralmillionsD.ManymillionA•1基数词（cardinalnumber）序数词的构成1)1－3,first,second,third。2)4－19,相应基数词+th,fourth,fifth,sixth,seventh,eighth,ninth,tenth,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth.3)20－90,y变成ie+th,twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eightieth,ninetieth。4)21－99,只把个位的基数词变成序数词如twenty-first,ninety-ninth5)序数词缩写----数字＋最后两字母如1st,2nd,3rd,4th…基变序,有规律,词尾加上“th”，一、二、三，特殊记，结尾字母t,d,d八去“t”，九去“e”，“f”要用ve替见“y”变成“i”和“e”，词尾加上“th”，若是遇到几十几，只变个位就可以。序数词缩写记清楚,数字后跟两字母。(序数词构成规律)24基数词序数词基数词序数词onetwelvetwotwentythreetwenty-onefourfortyfiveonehundredsixonehundredandfiveeightonehundredandtwenty-nineninenineteen一.基数词、序数词firstsecondthirdfourthfifthsixtheighthninthtwelfthtwentiethtwenty-firstfortiethonehundredthonehundredandfifthonehundredandtwenty-ninthnineteenth练习704653117121254280166704653428170346791445321694128654作业704653421017834679012543213074283216547670465342181703467931204321309428320654时间类型表示法例读法整点基数词（+o’clock)1:00﹤30分钟分钟+past+小时2:10=30分钟half+past+小时3:30﹥30分钟（60-分钟）+to+（小时+1）4:40分钟逢15即一刻钟aquarter5:156:45简化法按顺序读基数词7:50oneo’clocktenpasttwohalfpastthreetwentytofiveaquarterpastfiveaquartertosevensevenfifty表示在几点钟用介词at数词的表示法—时间1.—It’salready7:40now.Whenwillthefilmstart?—___.Westillhavefiveminutes.A.AquartertosevenB.AquartertoeightC.Sevenpastforty-five①月日年在1998年10月1日数词的表示法—年月日onOctorberthefirst,nineteenninety-eight日the+序数词月（首字母大写）月日与年之间用，分开年（两位两位读）onAugusttheninthinMay,twothousandandten天日用on年月用inonOct.1st,1998②月日在8月9日③月年在2010年5月1.Theaccidenthappenedon___.A.April5,2001B.2001,April5C.April2001,52.Iwasborn___.A.inMarch8,1993B.onJuly9,1994C.onMay,199520世纪90年代inthe1990s/1990’s在他50多岁时inhisfifties数词的表示法—1.年代世纪intheinone’s+整十基数词复数在某人几十岁时nineteennineties2、“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。a3–year–oldgirlaseven-dayholiday3、表计量--“基数词+度量单位+形容词”Theclassroomis7meterslong,6meterswideand3metershigh.331.Therewillbemorechancesin__centurythanin__century.A.twenty-one,twentyB.twenty-first,twentiethC.thetwenty-f