问题描述: Did you swim across the river Have you swam across the river?这两句话有什么区别 1个回答 分类:英语 2014-09-25 问题解答: 我来补答 Did you swim across the river -----强调“当时”是否游过河了Have you swum across the river?-----强调到“目前为止”是否有过游过河这样的经历 展开全文阅读