第21,22,23,24,25,26,27,28,29,30,31的英语怎么说答:一、20 以上的两位数基数词的结构为:-ty + 连字符- + 1-9的基数词 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-five 26 twenty-six 27 twenty-seven 28 twenty-eight 29 twenty-nine 30 thirty 31 thirty-one 二、整数20,30,40,...的序数词要在基数词的...