跪求8个不规则英语序数词,

首先,我们要弄清楚什么是规则的英语序数词.只要加 -th 就构成序数词的,就是规则的,例如：4 four -> fourth13 thirteen -> thirteenth100 hundred -> hundredth　假如要八个不规则的英语序数词的话,应该是这八个,不是直接加 -th,有或多或少的变化：1 one -> first2 two -> second3 three -> third5 five -> fifth8 eight -> eighth9 nine -> ninth12 twelve -> twelfth20 twenty -> twentieth　其他不规则的序数词,都可以由这八个词推论而得,例如所有个位是 0 的两位数,都是按照 twenty 的变化：ty -> tieth （例如：30 thirty -> thirtieth）所有个位不是 0 的两位数,按照个位的变化,例如：21 twenty-one -> twenty-first35 thirty-five -> thirty-fifth42 forty-two -> forty-second等等.

one-first, two-second, three-third, five-fifth, nine-ninth, twelve-twelfth, forty-fortieth, eighty-nine—eighty-ninth.

once,twice,thirds....

one first two second three third five fifth nine ninth twelve twelfth twenty twentieth thirty thirtieth40 50 60 70 80 90 都是 采纳哦~