以下是常见的序数词列表：
1st - first
2nd - second
3rd - third
4th - fourth
5th - fifth
6th - sixth
7th - seventh
8th - eighth
9th - ninth
10th - tenth
11th - eleventh
12th - twelfth
13th - thirteenth
14th - fourteenth
15th - fifteenth
16th - sixteenth
17th - seventeenth
18th - eighteenth
19th - nineteenth
20th - twentieth
21st - twenty-first
22nd - twenty-second
23rd - twenty-third
30th - thirtieth
40th - fortieth
50th - fiftieth
60th - sixtieth
70th - seventieth
80th - eightieth
90th - ninetieth
100th - hundredth
序数词通常在数词后添加"-th"构成。需要注意的是，部分不规则序数词如"first"和"second"并不遵循构成规则。
