求英语序数词是由1~20,然后就是21,32,43,54,65,76,87,98,109,110,121,132,143,154,165,176,187,198,209,210.1000和1001.

费了我老鼻子劲,加分噢
first second third fourth fifth sixth seventh eighth ninth tenth eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth
21 twenty-first,
32 thirty-second,
43 forty-third
54 fifty-fourth,
65 sixty-fifth,
76 seventy-sixth,
87 eighty-seventh,
98 ninety-eighth,
109 one hundred and ninth
110 one hundred and tenth
121 one hundred and twenty-first
132 one hundred and thirty-second
143 one hundred and forty-third
154 one hundred and fifty-fourth
165 one hundred and sixty-fifth
176 one hundred and seventy-sixth
187 one hundred and eighty-seventh
198 one hundred and ninety-eighth
209 two hundred and ninth
210 two hundred and tenth
1000 one thousandth
1001 one thousand and first