英语数词知识归纳总结
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英语数词知识点总结
数词分为基数词和序数词两种;
(一)基数词的用法。
(1)基数词表示数目。它的具体表达法是:三位数用hundred,l,000以上,先从右往左数,每三位数加一个“,”,第一个“,”前为thousand.第二个“,”前为million,第三个“,”前为billion,然后一节一节地表示。例如;
6;
260;
309→six million two hundred and sixty thousand three hundred and nine。
(2)表示数量。例句:I have two books.
(3)表示号码。eg.My phone number is 6887789.
(4)表示时间。eg.I watch CCTV News at seven o’clock every evening.
(5)表示“…十”的数词的复数可以表示人的岁数或年代。eg. He is in his early thirties.他有三十来岁(31—34岁):
(6)表具体数字时,hundred,thousand,million用单数。eg. There are six hundred students in our grade.
(7)表不确定的数字时,数词用复数。若带名词,再加of ,hundreds of(数百,成百上千 的),thousands of(数干,成千上万的),millions of(数百万)。eg . Hundreds of old people died of cold last winter.
(二)序数词在英语中表示顺序、次序的词称为序数词。
序数词的用法
(1.)the+序数词,表示“第几”
John lives on the fifteenth floor
(2).aan+序数词,表达"再一,又一"。eg.We'll have to do it a second time.
(3)年月日的表达。年用基数词表示,日用序数词表示
(4)分数的表达。分子用基数词,分母用序数词。分子大于1,分母加-s。
(5)序数词也可以用作副词,eg.
When did you first see him?
(6)基数词也能表示顺序,如书刊的页的数目,住所、房间、教室、电话号码等等。
Page Eight, Room 304,Class Seven,
(7).倍数表示法
主语+谓语+倍数(或分数)+ as + adj. + as,eg.I have three times as many as you.
(8)在…世纪。eg.in the twenty-first century