where和which引导非限制性定语从句（where和which引导的定语从句）

在复合句中，修饰名词或代词的句子是定语从句。定语从句又分限制性定语从句和非限制性定语从句。限制性定语从句不能和主句分开，非限制性定语从句要和主句用逗号分开。

where引导的非限制性定语从句：

I paid a visit to a famous university, where my brother are working.

which引导的非限制性定语从句：

Tom was late for class again, which made his mother angry.