问题描述： as is known to us that为什么不对呢? 1个回答 分类：英语 2014-10-18 问题解答： 我来补答 as引导非限制性定语从句,如果A loves B,as/which is known to us（定从） 如果把as is known to us 放于句首as is known to us ,A loves B（定从）,而which不行.这样子你也就可以明白了：一个句子可不能即充当主语从句（It is known to us that）又充当定从从句啊.大家互相学习帮助,本人为上海洋泾中学高二学生 展开全文阅读
