first second third fourth fifth sixth seventh eighth ninth tenth eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth twenty-first twenty-second twenty-third twenty-fourth twenty-fifth twenty-sixth twenty-seventh twenty-eighth twenty-nineth thirtieth thirty-first thirty-second thirty-third thirty-fourth thirty-fifth thirty-sixth thirty-seventh thirty-eighth thirty-nineth fortieth
匿名回答于2021-01-07 03:27:52
基数词变成序数词是有规律的，从第四开始，基数词后面要加上th。但是下面几个比较特殊，要单独记忆，例如第一first,
第二second,第三third,第五fifth,第八
eighth,第九ninth,第十二twelfth,整十变成序数词时把y变成i,再加上eth,表示第几十几时，只需要变个位
匿名回答于2022-01-17 08:26:56
