when was the last time you heard from him 其中的you heard from him是表语从句吗?

问题描述:

when was the last time you heard from him 其中的you heard from him是表语从句吗?

是同位语从句,补充说明the last time
表语从句要紧跟在be动词之后
你最后一次收到他的来信是什么时候?