基数词的构成

　　(1)1-20

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

　　sixteen,seventeen,eighteen,nineteen,twenty

　　(2)21-99 先说“几十”，再说“几”，中间加连字符。

　　23→twenty-three,34→thirty-four,

　　(3)101—999先说“几百”，再加and,再加末两位数或末位数;

　　586→five hundred and eighty-six,803→eight hundred and three

　　(4)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。

　　9,785→nine thousand, seven hundred and eighty-five

　　6,260,309→six million two hundred and sixty thousand three hundred and nine

　　750,000,000,000→seven hundred and fifty, billion