问题描述： couldn't后面是不可以加动词过去式?这是什么语法? 1个回答 分类：英语 2014-09-27 问题解答： 我来补答 couldn't后面 加动词过去式 这个过去式 与couldn't无关 couldn't后面省略了动词原形 如that i didn't do what i couldn't made him disappointed 展开全文阅读
