英语中数词的用法及例句
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英语中数词的用法及例句
要简短,十条左右,概括性强,较全面
要简短,十条左右,概括性强,较全面
一、基数词
1)基数词写法和读法:345 three hundred and forty-five;
2)基数词一般是单数形式,但下列情况,常用复数:
a.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;
b.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.
c.表示"几十岁";
d.表示"年代",用 in +the +数词复数;
e.在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
二、序数词
序数词的缩写形式:first---1st second---2nd thirty-first---31st
三、 数词的用法
1)倍数表示法
a.主语+谓语+倍数(或分数)+ as + adj.+ as
I have three times as many as you.我有你三倍那么多.
b.主语+谓语+倍数(分数)+ the size (amount,length…) of…
The earth is 49 times the size of the moon.地球是月球的49倍.
c.主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
The grain output is 8 percent higher this year than that of last year.
今年比去年粮食产量增加8%.
d.还可以用by+倍数,表示增加多少倍
The production of grain has been increased by four times this year.
今年粮食产量增加了4倍.
2)分数表示法
构成:基数词代表分子,序数词代表分母.分子大于1时,分子的序数词用单数,分母序数词用复数:
1/3 one-third ; 3/37 three and three-sevenths.
1)基数词写法和读法:345 three hundred and forty-five;
2)基数词一般是单数形式,但下列情况,常用复数:
a.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;
b.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.
c.表示"几十岁";
d.表示"年代",用 in +the +数词复数;
e.在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
二、序数词
序数词的缩写形式:first---1st second---2nd thirty-first---31st
三、 数词的用法
1)倍数表示法
a.主语+谓语+倍数(或分数)+ as + adj.+ as
I have three times as many as you.我有你三倍那么多.
b.主语+谓语+倍数(分数)+ the size (amount,length…) of…
The earth is 49 times the size of the moon.地球是月球的49倍.
c.主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
The grain output is 8 percent higher this year than that of last year.
今年比去年粮食产量增加8%.
d.还可以用by+倍数,表示增加多少倍
The production of grain has been increased by four times this year.
今年粮食产量增加了4倍.
2)分数表示法
构成:基数词代表分子,序数词代表分母.分子大于1时,分子的序数词用单数,分母序数词用复数:
1/3 one-third ; 3/37 three and three-sevenths.