数词可分为基数词和序数词。基数词表示数量,序数词表示事物的顺序或编号。请看下面基数词变序数词的规律。基数词变序数词一般情况下直接加th,有些特殊情况的变化,你只需记住下面的口诀,这些问题即可迎刃而解。【规律口诀】一、二、三特别记,(first,second,third)其余后加th; Numerals can be divided into base words and ordinal words. Cardinal words indicate numbers, ordinal words indicate the order or number of things. Look at the law of baseword words in the following order. Cardinal word orthographic words generally add th directly, and in some special cases, you only need to remember the following questions. These problems can be solved. [Rules] One, two, three special notes, (first, second, third) plus the other after th;