第1个回答 2013-11-12
你好。
1到10:
first , second , third , fourth , fifth , sixth , seventh , eighth , ninth , tenth ,
11到20:
eleventh , twelfth , thirteenth , fourteenth , fifteenth , sixteenth , seventeenth , eighteenth , nineteenth , twentieth ,
21:
twenty-first,
22:
twenty-second。
30:
thirtieth,
其余整十的序数词参考twentieth,非整十的序数词参考twenty-first。