it做形式主语that引导真正主语那么that从句属于主语从句吗

问题描述:

it做形式主语that引导真正主语那么that从句属于主语从句吗

我同意二楼的意见
it is wonderful that you will become the lead singer of our rock and roll band.
你将成为我们摇滚乐队的主场真是太好了。
it=that引导的从句,it 是形式主语,真正的主语是that引导的句子,因此得出:
it做形式主语时,that引导真正主语,that从句属于主语从句。

对啊.如果不用形式主语,举个例子
(That we wait for him right now )is impossible.我们现在不可能等他的.
这个句子很明显,that 从句是主语从句.
即使把句子改成用it作形式主语
It is impossible that we wait for him right now.
that引导的那个句子仍然是主语从句.