two-second
three-third
four-fourth
five-fifth
six-sixth
seven-seventh
基数词变序数词：一二三，特殊记，结尾分别是tdd;其他都加th,八加h,九去e,f来把ve替;整十数，先把ty变为tie,再加th;若是遇到几十几，只变各位就可以。例如twenty-one变为twenty-first.
匿名回答于2021-11-13 02:04:10
