问题描述: I won't lend you the book before I have finished it.为什么用have finished 1个回答 分类:英语 2014-10-31 问题解答: 我来补答 有 before 或 after 的句子,用完成时态或一般时态都可,无太大区别.这句用before I finish it也对. 展开全文阅读