在宾语从句中,连接副词可以充当表语吗?

Question

在宾语从句中,连接副词可以充当表语吗?

Answer 1

疑问副词也可以充当be动词的表语，如：
I don't know where they are.
I don't know where the problem is.
I don't know where the cheese is.
希望我能帮助你解疑释惑。