1、fivefifth
2、fortyfourtieth
3、thirtythirtieth
4、fifteenfifteenth
5、threeteenthreeteenth
6、twelvetwelfth
7、twentytwentieth
8、sevenseventh
9、fourfourth
10、seventeenseventeenth
11、onefirst
12、nineteennineteenth
13、nineninth
14、eleveneleventh
15、sixteensixteenth
16、sixsixth
17、eighteeneighteenth
18、threethird
19、ninetyninetieth
20、seventyseventieth
21、twosecond
22、sixtysixtieth
23、eighteighth
24、fiftyfiftieth
25、twenty-onetwenty-first
26、fourteenfourteenth
27、tententh
28、twenty-twotwenty-second
29、eightyeightieth
30、theletteronetoninehundredninetynine.其实数字可以直接写阿拉伯数字，因为阿拉伯数字是通用的。