简述句子“What were you doing when the rainstorm came"中,谁是从句,是什么从句,为什么?

问题描述:

简述句子“What were you doing when the rainstorm came"中,谁是从句,是什么从句,为什么?

when后面的是从句,时间状语从句
从句,有别于一般的句子,从句是复合句中的一部分,一般有引导词连接
上文这句话,when就是引导词,或是叫连接词
比如:
I was doing my homework at 7:00 p.m.
I was doing my homework when my mother came in.
这里when my mother came in就是从句,相当于时间状语 at 7:00 p.m,它所修饰限定的是我正在做功课的时间
这种用来代替时间状语的句子,就叫时间状语从句