MBA,MPA,MPACC联考英语词汇数词【mba加油站】一、数词的定义和分类数词是表示数目多少或顺序先后的词。
数词可以分为两类，即基数词和序数词。
表示数目多少的数词叫做基数词，表示顺序先后的数词叫做序数词。
二、数词的语法功能基数词或序数词可以作主语、表语、宾语、定语、同位语和状语等。
Two twos are four. (基数词作主语)The first is better than the second. (序数词作主语)She was the third to arrive. (序数词作表语)We three failed the English exam. (基数词作同位语)I hate riding two on a bike. (基数词作状语)When did youfirst meet him? (序数词作状语)三、基数词1. 基数词的构成(1) 1-12 为独立单词，分别用one，two，three，four，five, six, seven, eight, nine, ten,eleven, twelve 表示；13-19 以后缀-teen 结尾，分别用thirteen，fourteen, fifteen, sixteen,seventeen, eighteen, nineteen 表示；20-90 以后缀-ty结尾，分别用twenty，thirty，forty，fifty，sixty，seventy, eighty, ninety 表示。
(2) 百-hundred、千-thousand、百万-million、十亿-bil1ion、兆trillion(3)十位与个位之间需用连字符隔开。
43→forty-three 21→twenty-one(4) 百位与十位之间用and 连接。
637→six hundred and thirty-seven(5 )四位以上数字的读法1, 234，567，890billion, million, thousand, hundred读成one bi1lion, two hundred and thirty-four million，five hundred and sixty-seventhousand, eight hundred and ninety2. 基数词的用法(1)确指数字时，基数词只能用单数形式。
two hundred teachers two dozen (of) eggsfive score (of) students three score and ten years(2) 基数词在表示"好几十、成百上千、成千上万"等不确定的数字，与of 连用时，要使用复数形式。
dozens/scores of time hundreds of studentsthousands of birds tens ofthousands of antsmillions of people(3)"基数词+名词(+形容词)" "基数词+名词-ed"都可以构成复合形容词，作前置定语。
基数词，名词和形容词中间要用连字符，名词要用单数形式。
a five-hundred-word compositiona ten-storeyed buildinga ten-year-old girl (=a girl ten years old)a five-meter-wide road (=a road five meters wide)(4) 基数词表示年代。
2002 年two thousand and two1989 年nineteen eighty-nine (=nineteen hundred and eighty-nine)1980's(1980s) nineteen eighties73A.D.(A.D.73) seventy-three A.D.345B.C.(B.C.345) three forty-five B.C.(=three hundred and forty-five B.C.)(5) 基数词表示时刻。
1) 12 小时计时制在12 小时计时制中，整点后用o'clock ，也可不用。
表示上午时间用"a.. m./am/ A.M."，表示下午时间用"p.m/pm/P.M."。
①直接表达法6:00 six (o'clock)9:25 nine twenty-five a.m.12:30 twelve thirty p.m.②间接表达法用past/after (过)，to/of ( 差)也可以表示时刻"过"或"差"的时间一般限定在30分钟以内。
9:25 twenty-five past/after nine a.m.12:30 thirty past/after twelve (=half past/after twelve)7:45 fifteen to/of eight (=a quarter to/of eight)2) 24 小时计时制在24 小时计时制中，时刻后用hours 表示。
零点zero hours (=zero hour, O hundred hours)09:00(0900) O nine hours (=O nine hundred hours)18:00(1800) eighteen hundred hours13:45(1345) thirteen forty-five hours(6) 基数词表示书页、住所、房间、教室，电话号码等。
第3 页Page three (=P.3)Room 301 Room three O one电话2839096 two eight three, nine 0 nine, six(7)基数词表示数学公式。
2+3=5 Two plus/and three is/are/equals/is equal to/makes/make five. 10-4=6 Ten minus four is six.Four from ten leaves/is six.7x3=21 Seven times/multiplied by three is twenty-one.Seven threes is twenty-one.9÷3=3 Nine divided by three is three.(8) 基数词表示人的大概年龄，用于"in +one's+基数词复数"结构中。
He died in his sixties.She is still in her early/middle/late twenties.He is in his early/late teens.(9) 基数词用于"in the +基数词复数形式"结构中，表示年代。
in the early twentiesin the eighties of last century( 10) 基数词表示"每，每隔"的意义，用于"every+基数词+复数名词"结构中。
every four days (每4 天或每隔3 天)every other day, every two days (每隔1 天)every few days (隔些日子)( 11 )基数词构成的习惯用语ten to one 十有八九at sixes and sevens 乱七八糟inlby twos and threes 三三两两in twominds 三心二意six of one and half a dozen of the other 半斤八两四、序数词1. 序数词的构成序数词主要是通过在基数词词尾加th 构成的，如:fourth，thirteenth, tenth 等，但也有一些其他拼写形式。
(1)几个不规则拼写形式。
one→first(1st) two→second (2nd) three→third (3rd) five→fifth (5th)eight→eighth(8th) nine→ninth (9th) twe1ve→twelfth (12th)(2) 以-ty结尾的基数词变为序数词，把y 变i 为再加eth。
twenty→twentieth thirty→thirtieth forty→fortieth fifty→fiftiethsixty→sixtieth seventy→seventieth eighty→eightieth ninety→ninetieth(3)两位数的基数词变为序数词，只需将个位数变为序数词，十位数不变。
thirty-one→thirty-first sixty-three→sixty-third seventy-nine→seventy-ninth2. 序数词的用法(1)序数词一般都要和定冠词或物主代词连用。
This is the third time that 1 have been to Beijing.Tom was their second son.(2) 序数词还可以和不定冠词连用，此时不定冠词表示"再一，又一"的意思。
We have to do it a second time.When I sat down, a third person rose to speak.(3)序数词表示"每隔"的意义，用于"every+，序数词+单数名词"结构中。
every fourtb day (每4 天或每隔3 天)every tenth meter (每10 米或每隔9 米)every second day (每隔1 天)(4) 序数词表示编号，但不如基数词使用的普遍。
Unit One = the first unitPart Two = the second partParagraph Five = the fifth paragraph(5 )序数词表示日期。
August 1(st) 读成August the frrst 或the first of AugustMay 23(rd) 读成May the twenty-third 或the twenty-third of May(6) 序数词构成的习惯用语second to none 不亚于、胜过second on1y to 仅次于at first sight 乍看起来first ofall 首先give it a second thought 再想一下First come, first served. 捷足先登五、分数词、小数词、百分数和倍数表示法1.分数词的构成和读法分数词是由基数词和序数词合成的，分子用基数词表示，分母用序数词表示。