first second third fourth fifth sixth seventh eighth ninth tentheleventh twelfth thirteenth fourteenth fifteenth .twentiethtwenty-first twenty=second ....我要序数词的1~40和506070 80 90 100fortieth fiftieth sixtieth seventieth eightieth ninetieth hundredth1~40的都是有规律的。35：thirty-fifth;45:fourty-fifth几十一：。。first几十二：。。second几十三：。。third其他的就是整十+个位的序数词谢谢