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​五的英文怎么读(第二十五的英文怎么读)

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摘要:五的英文怎么读(第二十五的英文怎么读) 数词(Numeral),简称(num),是指表示数目多少或顺序多少的词。 1、用法 英语的数词可以作句子的主语、宾语、表语和定语。 2、分类 数词

五的英文怎么读(第二十五的英文怎么读)

数词(Numeral),简称(num),是指表示数目多少或顺序多少的词。

1、用法

英语的数词可以作句子的主语、宾语、表语和定语。

2、分类

数词分为两大类,即基数词和序数词。基数词表示数目,序数词表示顺序。

基数词一般是单数形式,但下列情况,常用复数:

(1)与of短语连用,表示概数,不能与具体数目连 用,如:scores of people 指许多人。

(2)在一些表示"一排"或"一组"的词组里,如:

They arrived in twos and threes. 他们三三两两的到达了。

(3)表示"几十岁"为dozens of ages。

(4)表示"年代",用 in the 数词复数。

(5)在乘法运算的一种表示法里,如:

3 x 5 = 15 Three fives is (are) fifteen.

3、基数词及其用法

(1)基数词 1-12 是独立单词,需逐个记忆。

one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve

(2)基数词 13-19是个位数词的词干后加-teen 构成。其中 thirteen, fifteen, eighteen 变化不规则。

thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen

(3)基数词 20-90 是在个位数词后面加 -ty 构成。其中 twenty, thirty, forty, fifty, eighty 变化不规则。

twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety

(4)基数词 21-99 是在十位数词后面加上个位数词合成,中间加上连字符 " – " ,如:

21 twenty-one,95 ninety-five

(5)百、千、十万、十亿

a hundred,a thousand,a million,a billion

(6)基数词三位以上的数词, 在百位和十位之间,一般要用连词"and ",十万位和万位,亿位和千万位之间通常也要加and,如:

132 one hundred and thirty-two

1340 one thousand three hundred and forty.

英语中没有万,千万,亿这样的单位数词,ten thousand 十千=一万。

用阿拉伯数字书写千以上的数目时,要由右向左每三位数间留一个空格或写一个逗号。第一个前为thousand;第二个前为million;第三个前为thousand million(英)或billion(美)。每两个空格间或两个逗号间的三位数都被看作“十位数或百位数的千”或“十位数或百位数的百万”,如:

56 000 fifty-six thousand

600,000,000 six hundred million。

dozen,score,hundred,thousand,million等数词前面有基数词或某些表示数量的形容词时,不加-s,如 :

a few hundred meters 几百米

several million people 数百万人

two thousand teachers 两千位老师

但如果表示“几百”“几千”“几百万”等笼统的数目时,则应用“复数+of”构成短语,如:

hundreds of books 几百本书

thousands of workers 几千个工人

hundred、 thousand、 million作数词时,不用复数,前面可以加上one, two, …等其它数词。用作名词时复数表示“成…上…”,后面必须要有of,前面可以加上some,many,several等词,如:

five hundred(五百)

hundreds of(成百上千的)

ten thousand(一万)

thousands of(成千上万的)

millions of(成百万的)

4、基数词的使用位置

(1)位于another,all之后,如:

Can you have another two cakes? 你还能吃2块蛋糕吗?

The boy lost all the five pencils last week.这孩子上周把5枝铅笔全丢了。

(2)位于such和more之前如:

I can finish reading two such books in two days.两天里我能读完这样的两本书。

Please give me one more apple to eat.请再给我一个苹果吃。

(3)可置于last,next,other之前或之后,如:

His last two books are written in English.他的后两本书是用英语写的。

5、序数词及其用法

(1)序数词的缩写形式为阿拉伯数字加序数词的最后两个字母,如:

first—1st;second—2nd; third-3rd;thirty-first—31st

(2)基数词变序数词口诀

一,二,三要全变,如:

one-first; two-second;three- third

其余都加th, th里有例外,8去t,(eight-eighth) 9去e(nine-ninth)字母f代ve(five-fifth; twelve-twelfth)

ty变成tie(twenty-twentieth)

若要变化几十几,只变个位就可以(twenty-one-twenty-first)

6、基数词的用法

(1) 作定语、如:

There are only three boys in the class. 班上只有3名男生。Ten people will come to the party. 十个人要来参加聚会。

(2) 作主语,如:

It is said that thirteen is an unlucky number. 据说13是个不吉利的数字。

Three of them will play football. 他们中有三人要去踢足球。

(3) 作宾语,如:

It is worth three hundred. 这件东西值300。

The city has a population of three million. 这个城市有三百万人口。

(4) 作表语,如:

I am eighteen. 我18岁。

Two and two is four. 二加二等于四。

(5) 作同位语,如:

Are you two coming? 你们俩来吗?

They ten will go abroad. 他们十个人将出国。

(6)有时序数词前面可加不定冠词来表示“再一”,“又一”这样的意思,如:

We'll have to do it again. 我们得重做一次。

Shall I ask him a third time? 还要再问他一次吗?

When Nash sat down, a fourth man rose to speak.纳什坐下后,第四个人又起来发言。

(7)作表语时,序数词前的定冠词往往省去,如:

Lynd was second last year. 林德去年是第二。

7、在很多情况下,可以用基数词代替序数词来表示顺序,如:

the second part = Part two (第二部分)

the first chapter = Chapter one (第一章)

the fourth section = Section four (第四节)

8、倍数表达法

()1)基数词+倍数+形容词/副词比较级+than,用…times表示,如:

The girl is ten times cleverer than her brother.

(2)如果表示“是……两倍数”,一般用twice,如:

My room is twice as large as yours.

(3)基数词+倍数+as+形容词/副词/名词+as,如:

His apartment is three times as large as that of mine.

Americans eat twice as much protein as they actually need every day.

My aunt is as old age as I am. 我姑姑年龄和我一样大。

(4)基数词+倍数+名词,如:

The volume of the Sun is about 1,300,000 times that of the earth.太阳的体积约为地球的1300000倍。

(5)动词+基数词+倍数,用-fold或基数词加times表示,如:

The value of the stock has increased two-fold since we bought it.

Productivity is increased three fold. 生产效率提高了两倍。

The pants have shortened two times since they were bought.

(6)用double(翻一番)

2023.03.31

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