问题描述： 现在完成时的结构 1个回答 分类：英语 2014-10-07 问题解答： 我来补答 肯定句：have/has +v.(过去分词）eg.I have already finished my homework .否定句：have/has +not +v.(过去分词）eg.I haven't heard from him yet.一般疑问句：Have/Has+主语+v.(过去分词）eg.Have you ever been to Beijing? 展开全文阅读
