✔ 最佳答案
基數詞CARDINAL序數詞ORDINAL
1one 第一1stfirst
2two 第二2ndsecond
3three第三3rdthird
4four 第四4thfourth
5five第五5thfifth
6six第六6thsixth
7seven第七7thseventh
8eight第八8theighth
9nine第九9thninth
10ten第十10thtenth
11eleven第十一11theleventh
12twelve第十二12thtwelfth
13thirteen第十三13ththirteenth
14fourteen第十四14thfourteenth
15fifteen第十五15thfifteenth
16sixteen第十六16thsixteenth
17seventeen第十七17thseventeenth
18eighteen第十八18theighteenth
19nineteen第十九19thnineteenth
20twenty第二十20thtwentieth
21twenty-one第二十一21sttwenty-first
22twenty-two第二十二22ndtwenty-second
23twenty-three第二十三23rdtwenty-third
30thirty第三十30ththirtieth
40forty第四十40thfortieth
41fortyfirst