基数词
表示数目多少或顺序先后的词叫数词。
1.基数词的构成：
1-10 one, two, three, four, five, six, seven, eight, nine, ten;
11-19 eleven, twelve, thirteen, fourteen, fifteen, sixteen,
seventeen, eighteen, nineteen;
20-90 twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety;
≥ 100
100 a/one hundred;
1,000 a/one thousand;
1,000,000 a/one million;
1, 000,000,000 a/one billion = a/one thousand million
2. 基数词的用法
1)作主语：
Three will be enough for us.
三个对我们来说就足够了。
Two of the girls are from Tokyo.
这些姑娘中有两位来自东京。
2)作宾语：
Four people applied for this job, but we only need one.
四个人申请这工作，但我们仅需一人。
3)作表语：
The population of China is over 1.3 billion.
中国有十三亿多人口。
I’m twenty while my brother is sixteen.
我二十岁，我弟弟十六岁。
4)作定语：
We have 300 workers in our company.
我们公司有三百名员工。
Forty students were involved in the interview. 四十名学生参加了这次采访。
5)作同位语：
你们两个打扫这些位子。
Have you got tickets for us three?
有我们三个人的票吗?