This is the time when (at which) she left for Beijing.这究竟是定语从句还是状语从句啊~用when的不是状语从句吗?

问题描述:

This is the time when (at which) she left for Beijing.这究竟是定语从句还是状语从句啊~用when的不是状语从句吗?
状语从句不是用when吗?

定语从句
when可以做定语从句的关系副词,时间状语从句的连词