问题描述： 过去完成时的被动语态 1个回答 分类：英语 2014-10-26 问题解答： 我来补答 过去完成时主语+had +过去分词We had finished learning Book1 till last week.过去完成时的被动语态主语+had been +过去分词Book1 had been finished learning(by us )till last week. 展开全文阅读
