问题描述: every+序数词+单数名词和every+基数词+复数名词的用法和区别 1个回答 分类:英语 2014-12-13 问题解答: 我来补答 “every+序数词+单数名词” = “every+基数词+复数名词”every third day = every three days 每三天,每隔两天 展开全文阅读