only when-------to explain----the reason for this.started.did she realize为什么啊

问题描述:

only when-------to explain----the reason for this.started.did she realize为什么啊

倒装,以Only开头的句子,句子的谓语要倒装!
这里when he started.是一个时间状语从句,句子的主要部分是后面,She realized the reason for this,但是要倒装,就变成了did she realize.