I have no idea when he will be back.是状语从句还是同位语从句,为什么?

问题描述:

I have no idea when he will be back.是状语从句还是同位语从句,为什么?

I have no idea when he will be back.
是同位语从句,因为从句when he will be back是前面的idea的内容,起到介绍说明的作用.
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