一到三十的序数词（英语）

first
second
third
fourth
fifth
sixth
seventh
eighth
ninth
tenth
eleventh
twelfth
thirteenth
fourteenth
sixteenth
seventeenth
eighteenth
nineteenth
twentieth
twenty first
如此类推
……
thirtieth

first second third fourth fifth sixth seventh eighth nineth tenth eleventh twelveth 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

1 first
2 second
3 third
4 fourth
5 fifth
6 sixth
7 seventh
8 eighth
9 ninth
10 tenth
11 eleventh
12 twelfth
.
.
.
.
如此类推
20 twentieth
21 twenty-first
22 twenty-second
23 twenty-third
24 twenty-fourth
30 thirtieth