问题描述： happened to do和‘happen to do ;区别? 1个回答 分类：英语 2014-11-29 问题解答： 我来补答 该短语应该是sb,"某人碰巧做某事happened to do 是 happen to do 的过去式,意思没有差别I happened to meet him in the park this morning 展开全文阅读
