基数词和序数词的转换从1到100都要

1 one first2 two second3 three third4 four fourth5 five fifth6 six sixth7 seven seventh8 eight eighth9 nine nineth10 ten tenth11 eleven eleventh12 twelve twelfth13 thirteen thirteenth14 fourteen fourteenth以此类推。20 twenty twentieth21 twenty-one twenty-first22 twenty-two twenty-second。30 thirty thirtieth40 forty fortieth。100 one-hundred one-hundredth21