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2023年12月12日发(作者:)

数词(numeral)

表示数目多少或顺序先后的词叫做数词(numeral)。数词与不定代词很相似,其用法相当于名词与形容词。 数词有两种。表示数目多少的数词叫做基数词(cardinal

numberal), 如one, ten, fifty-two等。表示顺序先后的数词叫做序数词(ordinal

numeral), 如first, tenth, fiftieth等。

(一)基数词

1)1—12的基数词是:one 1 seven 7 two 2 eight 8 three 3 nine 9 four 4 ten 10 five

5 eleven 11 six 6 twelve 12

13—19,皆由3—9加后缀-teen构成,即: thirteen 13 seventeen 17 fourteen 14

eighteen 18 fifteen 15 nineteen 19 sixteen 16 (注意:thirteen,

fifteen, eighteen的拼法)

20—90等十位数均由2—9加后缀-ty构成,即: twenty 20 thirty 30 forty 40

seventy 70 fifty 50 eighty 80

sixty 60 ninety 90 (注意:twenty, thirty, forty, fifty, eighty的拼法)

21—29由十位数20加个位数1—9构成,中间须有连字符“-〞,即:

twenty-one 21 twenty-six 26 twenty-two 22 twenty-seven 27 twenty-three 23

twenty-eight 28

twenty-four 24 twenty-nine 29 twenty-five 25

其它的十位数照此类推,如: thirty-one 31 seventy-five 75

2)百位数由1—9加hundred构成,如包含十位数及个位数,中间用and连接,也可以不用;如只包含个位数,即十位数为零时,那么and不可省。如: a (one) hundred

100 two hundred 200 seven hundred and six 706

a (one) hundred (and)twenty-five 125 three hundred (and) forty-one 341 nine

第 1 页 hundred (and) eighty-seven 987

twelve hundred 1200 (英语中从1 100—1 900之间的整数常用hundred表示)

3)千位数由1—9加thousand构成,其后的百、十、个位数构成方法同前。如:

a (one) thousand 1 000 two thousand 2 000 three thousand 3 000

five thousand six hundred 5 600 six thousand eight hundred 6 800

a (one) thousand one hundred (and)forty-nine 1149 (此处hundred之前不可用a)

three thousand five hundred (and) thirty-seven 3 537英语里没有“万〞这一单位,万也用thousand表示。如:

ten thousand 10 000 twenty thousand 20 000 thirty thousand 30 000

ten thousand one hundred 10 100 twenty thousand two hundred (and)

thirty 20 230

forty thousand seven hundred (and) eighty-five 40 785

fifty-five thousand four hundred(and)ninety-three 55 493

十万的说法是:

a (one) hundred thousand 100 000 two hundred thousand 200 000

one hundred and one thousand 101 000 (此处thousand之前不可用a)

two hundred twenty thousand 220 000 three hundred forty thousand five

hundred 340 500

four hundred sixty-two thousand seven hundred (and)eighty-nine 462 789

4)百万的说法是:

a (one) million 1 000 000 two million 2 000 000 two million three

hundred thousand 2 300 000

第 2 页 three million four hundred twenty-one thousand five hundred 3 421 500

four million five hundred thirty-five thousand six hundred(and)fifty-nine 4

535 659

千万及千万以上的说法是:

sixty million 6千万 five hundred million 5亿 eight thousand million 80亿(等于美国英语eight billion)

thirty thousand million 3百亿(等于美国英语thirty billion)

a (one) hundred thousand million 1千亿(等于美国英语a(one) hundred billion)

5)基数词相当于名词,可有复数形式,其构成方法及读音与名词一样。hundred,

thousand与million的复数形式常后接of短语,表示不确定数目。如: two threes 两个三 a man in his forties 40多岁的人

hundreds (thousands, millions) of dollars 成百(千、百万)美元 tens of

thousands of people 成万的人

hundreds and hundreds of times 成百倍 thousands upon thousands people

成千成万的人

[注]million的名词性较强,故亦可说a million of times(百万倍),two millions of

people(2百万人)等。

如hundreds, thousands与millions的意义清楚时,其后的of短语可省去,如:

Hundreds of thousands are homeless. 几十万人无家可归。

表示数量的dozens与scores的用法与hundreds, thousands相似。如:

I have told you dozens of times. 我跟你说过几十次了。

They received scores of letters about their TV programmes. 关于他们的电视节目,他们收到了大批来信。

第 3 页 (二)基数词的功用

基数词在句中可用作主语、表语、宾语、定语、同位语与状语等。

1)用作主语。如:

It is said that thirteen is an unlucky number. 据说13是一个不吉利的数目。

Three of them joined the school team. 他们中有三人参加了校队。(如说the three

of them那么意谓“他们三人〞)

Two twos are four. 二二得四。

[注]There were eight of us in my family的意思是“我们家里以前有八口人〞,表示数人数的结果。of在此表同位关系。

2)用作表语。如: The boy is ten. 这男孩十岁了。(等于ten years old)

Five times five is twenty-five. 5乘5等于25。

3)用作宾语。如: The shop-assistant wears a nine on her uniform. 那个女售货员的制服上戴着9号徽章。

4)用作定语。如: I have invited ten people to the party. 我邀请了10个人参加晚会。

[注]在the(a, that)100 metre race(那(一)项百米赛跑)中的100须读作one hundred.

5)用作同位语。如: Are you two reading 你们二人在看书吗

6)用作状语。如: I hate riding two on a bike. 我不喜欢骑自行车带人。

(三)序数词

英语序数词第1—19除first,second与third有特殊形式外,其余均由基数词加后缀-th构成。现将第1—19的序数词(包括其缩写式)列出如下:

第 4 页 first 1st eleventh 11th second 2nd twelfth 12th(twelf加th) third 3rd

thirteenth 13th

fourth 4th fourteenth 14th fifth 5th(fif加th) fifteenth 15th sixth 6th

sixteenth 16th

seventh 7th seventeenth 17th eighth 8th(后只加h) eighteenth 18th ninth

9th(nin加th) nineteenth 19th tenth 10th

十位数的序数词的构成方法是:先将十位数的基数词的词尾ty中的y变为i,然后加后缀-eth。如:

twentieth 20th fortieth 40th thirtieth 30th

十位数的序数词如包含1—9的个位数时,十位数用基数词,个位数用序数词,中间须有连字符“-〞。如:

twenty-first 21st forty-fourth 44th thirty-second 32nd eighty-seventh 87th

百、千、万等的序数词由hundred, thousand等加-th,前面加有关的基数词构成。如:

(one) hundredth 100th (one) thousandth 1 000th ten thousandth 10

000th

(one)hundred thousandth 100 000th (one)millionth 1 000 000th ten

millionth 10 000 000th

(one) hundred millionth 100 000 000th (one)billionth 1 000 000 000th

注意序数词hundredth, thousandth, millionth, billionth之前的“一〞只可用one,不可用a。

这种多位数序数词的后位数如包含1—9时,后位数用序数词,前位数同基数词,中间出现零时,须用and连接。如:

第 5 页 two hundred and first 201st

three thousand two hundred(and)twenty-first 3 221th

序数词亦可有复数形式,其构成方法及读音与名词一样。

序数词的功用

序数词在句中可用作主语、表语、宾语、定语、同位语与状语等。

1)用作主语。如: The first is better than the second. 第一个比第二个要好。

2)用作表语。如: She was the third to arrive. 她是第三个到的。

3)用作宾语。如: He was among the first to arrive. 他是首批到达的。

4)用作定语。如: A third man entered the room. 又有第三个人进入房间。 the first

two chapters 最前的两章

[注]试比拟 the two first prizes 两个第一奖

5)用作同位语。如: On Friday, the 10th instant, Mr. and Mrs. Cole celebrated

their silver wedding-day.

科尔夫妇于本月10日星期五庆祝他们的银婚。

6)用作状语。如: When did you first meet him 你什么时候与他首次见面的

倍数、分数、小数与百分数的表示法

1)表示倍数的方法有多种。如: Three threes are nine. 三三得九。

表示三以上的倍数用times, 但表示两倍(汉语中的一倍实际上也指两倍)时那么用twice。如:

Twice three is six. 二三得六。

表示倍数也可用again, double, triple, quadruple fold等词。如:

My uncle is as old again as I am. 我叔叔的年龄比我大一倍。

表示增加多少倍可用百分比。如:

第 6 页 Population has increased by 200% in the past 25 years. 人口在过去25年内增加了200%。

如表“增加〞用times与fold,那么须注意英语要多说一倍,如说“增加了三倍〞,那么须用four times或fourfold。如:

Output of coal increased four times(或fourfold). 煤产量增加了三倍。

2)表示分数时,分子须用基数词,分母用序数词。分子如是1以上,分母须用复数形式。如:

1/3 读作 a (one) third 2/3 读作 two thirds 1/4 读作 a (one)

quarter (或fourth)

3/4 读作 three quarters (或fourths) 2/5 读作 two fifths

但是 1/2 须读作a(one)half(不读作one second)数学中可都用基数词读,如1/2读作one over two,2/3读作two over three, 3/4读作three over four, 11/20读作eleven over twenty。尤其是较复杂的分数多用此读法,如27/283应读作twenty

seven over two hundred(and)eighty-three。

整数与分数之间须用and连接。如:

5 1/2 读作 five and a half 7 2/5 读作 seven and two fifths

分数用作前置定语时,注意以下写法与读法:

a one-third mile 三分之一英里(用one, 后有连字符)

a three-quarter majority 四分之三的多数(用单形quarter)

a two-thirds majority 三分之二的多数(用复形thirds)

分数相当于名词时,用不用连字符皆可。如: three-quarters (three quarters) of a

mile四分之三英里

3)小数的读法是:小数点前的基数词与前面所讲的基数词读法完全一样,小数点后那么第 7 页 须将数字一一读出。如:

1. 25 读作 one point two five 3. 728 读作 three point seven two eight

0. 56 读作 (naught)(美国用zero)point five six

0. 009 读作 (naught)point naught naught nine(美国用zero代替naught)

4)百分数中的百分号%读作per cent。如:

5% 读作 five per cent 0. 5% 读作 (naught) point five per cent 300%

读作 three hundred per cent

算式表示法

关于加、减、乘、除算式的读法:

2+ 2=4 读作 Two plus two equal(s) four. 10-3=7 读作 Ten minus three is

seven.

9×6=54 读作 Nine multiplied by six is fifty-four. 20÷4=5 读作 Twenty

divided by four is five.

[注]通常说“加〞可用and, 如Two and two are four(2+ 2=4)。说“减〞可用from,

如One from four leaves three(4-1=3)。说4×5=20亦可用Four fives are twenty或Four times five is twenty。说“除〞可用into, 如Four into twenty goes

five(20÷4=5)。

关于比例与乘方、开方的读法:

3∶2 读作 the ratio of three to two

12∶3=4 读作 The ratio of twelve to three equals four.

32 读作 three squared

33X4=27 读作 Three cubed is twenty seven.

=Y 读作 The fourth power of x is y.

第 8 页 =3 读作 The square root of nine is three.

=3 读作 The cubic root of twenty-seven is three.

(17- + 65/5)-(4×3)=15 应读作 Seventeen minus the square root of nine, plus

sixty-five over five, minus four times three, equals fifteen.

表示面积常用by,如说一个房间的面积是3′×6′(3英尺×6英尺),应说three feet

by six feet; 如房间为6英尺见方,那么可说six feet by six feet, 也可以说six feet

square,其总面积为thirty-six square feet。

编号表示法

编号可用序数词或基数词表示,序数词位于名词之前,并加定冠词,基数词位于名词之后。如:

the second part=part two 第二局部

the eighth lesson=lesson eight 第八课

由于基数词简单,所以用基数词的情况较多。如:

Number 6 第6号(读作number six, 缩写式为No. 6)

line 4 第4行(读作line four,缩写式为L. 4)

page 10 第10页(读作page ten, 缩写式为p. 10)

Room(No. )101 第101房间(读作Room(number)one oh one)

No. 10 Downing Street 唐宁街10号

Platform(No. )5 第5站台

Bus (No. )332 第332路公共汽车

Tel. No. 801-4609 号码801—4609读作telephone number eight oh one four

six oh nine, 在eight, oh, one之后应稍加停顿。

postcode(或zip code) 100081 邮政编码 100081

第 9 页 [注] 与门牌号码中的0多读作oh。

年、月、日表示法

请看以下各例:

1949 1949年(读作nineteen forty-nine或nineteen hundred and forty-nine)

1900 1900年(读作nineteen hundred)

1908 1908年(读作nineteen and eight或nineteen hundred and eight)

1960s (1960’s) 20世纪60年代(读作nineteen sixties)

450B. C. 公元前450年(读作four fifty B. C. 或four hundred and fifty B. C. )

476A. D. (A. D. 476) 公元476年(读作four seventy-six A. D. 或four hundred

and seventy-six A. D. (A. D. 在不会误解的情况下常可省略)

February 7(th) (7(th) February) 2月7日(读作February the seventh)(或February

seven或February seventh)。7(th)February那么读作the seventh of February.

February 7, 1986 1986年2月7日,可缩写成 7/2/86(或7,2,86)(英式)或2/7/86(或2,7,86)(美式)

下面是各个月份及其缩写式:

January Jan. July — February Feb. August Aug. March Mar.

September Sept.

April Apr. October Oct. May — November Nov. June —

December Dec.

时刻表示法

请看以下各例:

第 10 页 (at)six o'clock(或at six) a. m. (或am) (在)上午六时

half past six p. m. (或pm) 下午六时半

(a) quarter past six a. m. (或am) 上午六时一刻

(a) quarter to eight p. m. (或pm) 下午八时差一刻

five to eight p. m. (或pm) 下午八时差五分

[注] 美国英语可用after代替past,用of代替to。

除用文字外,还可用阿拉伯数字表示时刻,如:

6. 00 (英式) 6∶00 (美式) (读作six)

6. 25 (英式) 6∶25 (美式) (读作six twenty-five)

还有一种以24小时时制的表示法,如:

06. 00或06∶00 (读作zero six hundred hours)

21. 25或21∶25 (读作twenty-one twenty-five)

币制表示法

关于英国币制的说法见以下各例:

1p 1便士(读作one penny或one p)

5p 5便士(读作five pence或five p)

£5. 86 5英镑86便士(读作five pounds eighty-six pence)

关于美国币制的说法见以下各例:

1C\ 1美分 (读作one cent或one penny)

$1. 25 1美元25美分 (读作one dollar twenty five或one twenty-five)

美国硬币除penny外,还有nickel(=five cents), dime(=ten

quarter(=twenty-five cents), half-dollar(=fifty cents)等。

第 11 页

cents),

本文标签: 表示基数词序数词可用读作