来源:网络资源 2023-07-08 16:27:17
(一)数词的分类:
表示数目多少或顺序的词叫数词。数词分为基数词和序数词。
表示数目多少的数词叫基数词。one,two
表示顺序次第的数词叫序数词。the first(第一)、the second(第二)(二)数词的用法:
1.作主语
Thirty of them are Party members.他们之中的三十人是党员。
2.作宾语
Please pass me the second.请递给我第二个。
3.作定语
The nine boys are from Tianjin.这九个男孩子是天津人。
4.作表语
Six plus four is ten.六加四等于十。
5.作同位语(只限基数词)
We four will go with you.我们四个人将和你一起去。
B.用法总结
(一)基数词的表示方法:
1. 1-12的基数词:
one, two, three, four, five, six, seven, eight, nine, ten,eleven, twelve
2. 13~19的基数词,在个位数上加后缀-teen构成,并有两个重音。
thirteen, fourteen, fifteen, sixteen, seventeen, eighteen,nineteen
3. 20~90等十位数由2-9加后缀-ty构成。
twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
4. 21-29由十位数20加个位数1-9构成,十位和个位之间加连字符号"-",其他十位数以此类推。
21 twenty-one、44 forty-four、98ninety-eight
5.多位数的读法
①从后向前数,每三位数加一个",";第一个","号前为thousand(千),第二个","号前为million(百万)……,然后再逐段表达。
②三位数数词要在百位和十位(若无十位则和个位)之间加and。
45,632,798读作
forty-five million, six hundred and thirty-two thousand, sevenhundred and ninety-eight
(二)序数词的表示方法:
序数词=基数词+th,但以下几个特殊:
one-first, two-second, three-third, five-fifth. eight-eighth,nine-ninth, twelve-twelfth, twenty-twentieth ……, a hundred-a hundredth
(三)倍数、分数、小数、百分数的表示方法:
1.倍数:time(s)
This room is three times as large as that one.这个房间有那个房间三个大。
Three threes are nine. or Three times three is nine.三三得九。
2.分数:
分子用基数词表示,分母用序数词表示,分子为2以上时,分母(序数词)应变为复数。
三分之一,one third, a third;五分之三,three fifths
数短语作主语时,谓语的数由of后面的名词来决定,名词为可数名词复数,则谓语用复数;名词为不可数名词,谓语用单数。
A third of the land is covered by forests.
Two thirds of the workers are working hard.
3.小数:
小数点前的基数词与前面所讲的基数词读法完全相同,小数点后面则须将数字一一读出。
1.25读作one point two five
0.56读作naught point five six或zero point five six
4.百分数:
百分号%读作percent
eg.
5%读作five percent
(四)算式表达法:
1.加法
A+B=C → A plus B is C. or A and B is C.
2.减法
A-B=C →A minus B is C. or B from A is C.
3.乘法
A×B=C → A times B is C. or A multiplied by B is C.
4.除法
A÷B=C → A divided by B is C.
5.大于
A>B → A is more than B.
6.小于A
(五)常见数词的表示法及读法
1.
第一章:
第二节:
第三课:
第
第
注意:如果页码的数字较长,通常用基数词。
2.
第
长安街
电话号码:
十一路公共汽车:
3.
(
eg.
公元
(
eg.
5
(
eg.
8
(
eg.
二十世纪九十年代:
4. hundred, thousand, million
hundred, thousand, million
eg.
t
hundreds of
Thousands and thousands of people have visited the city.
成千上万的人参观了这座城市。
(六)需注意的问题:
1.
eg.
a four-year-old boy
2.
eg.
the first three questions
the last five minutes
3.
eg.
one and the only
be on all fours
Two's company, three is a crowd
one and the same
ten to one
talk nineteen to the dozen
in ones and twos
first of all
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