数词数词主要分为基数词和序数词
基数词表示数目,序数词表示顺序
一.基数词1
构成:(1)1—12单独记
one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve
(2)13—19词尾都有teen
thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen.但thirteen,fifteen,eighteen需要特殊记
(3)20—90整十的词尾都以ty结尾
twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety
(4)“几十几”要加连字符合“-”
如:21twenty-one76seventy-six(5)“几百几”或“几百几十几”加and.如:101onehundredandone320threehundredandtwenty648sixhundredandforty-eight(6)千位数以上从数字的右端向左端数起,每三位数加一个逗号“,”
从右开始,第一个“,”前的数字为千(thousand),第二个“,”前面的数字为百万(million),第三个“,”前的数字为十亿(billion)
如:2,648twothousandsixhundredandforty-eight16,250,364sixteenmilliontwohundredandfiftythousandthreehundredandsixty-four5,237,166,234fivebilliontwohundredandthirty-sevenmilliononehundredandsixty-sixthousandtwohundredandthirty-four2
用法:(1)表示数量
如:Therearefif