问题描述: the book he is looking is very thick.这里可以用2个is吗?这个是什么语法? 1个回答 分类:英语 2014-11-12 问题解答: 我来补答 可以,因为he is looking是定语从句,省略了which或that,形容the book主句是the book is very thick 展开全文阅读