三十一到四十的序数词为:
1、31 thirty-first 31st
2、32 thirty-second 32nd
3、33 thirty-third 33rd
4、34 thirty-fourth 34th
5、35 thirty-fifth 35th
6、36 thirty-sixth 36th
7、37 thirty-seventh 37th
8、38 thirty-eighth 38th
9、39 thirty-ninth 39th
10、40 fortieth 40th
扩展资料:
基数词变序数词
1、在数词后面加th。例子:four → fourth。
2、one,two,three特殊变。例子:first,second,third。
3、eight去掉t,nine去掉e。twenty去掉y变成twentieth。eight → eighth,nine → ninth。
4、five和twelve的ve要变成f 。five→ fifth,twelve→ twelfth。
5、两位数或两位以上数字只变个位。thirty-three→thirty-third。
6、序数词前必须加the(上述原则中的除外),the first day。
参考资料来源:百度百科-序数词