精选优质文档-倾情为你奉上高中定语从句限定性定语从句：队先行词起修饰、限定作用 非限定性定语从句：对先行词进行补充说明，相当于一个并列句，用逗号把定语从句同先行词分开注：在非限定性定语从句中，关系代词which/as既可以代指前面的先行词，又可以代指前面的整个句子。:He told me the news,which I have known.He was ill in bed,which was konwn by us. ：非限定性定语从句中，如果由as引导，既可以把定从放后（主句），又可放前。:As was known by us,he was ill in bed. It was known by us that he was ill in bed. ：as在从句中出现时，从句常用被动结构。:He passe
