1.从属连词that引导的主语从句
That you’re leaving is a pity.很遗憾你要离开。
That he is still alive is a wonder.他还活着，真是奇迹。
2.从属连词whether引导的主语从句
Whether it will do us harm remains to be seen.是否对我们有害还要看一看。
Whether they would support us was a problem.他们是否会支持我们还是一个问题。
3.连接代词和连接副词引导的主语从句
Who has broken the glass is unknown.谁打破了玻璃现在还不知道。
What he did last night is being investigated.他昨天晚上干了些什么正在调查之中。
How it was done was a mystery.这是如何完成的是一个谜。
When he was born is unknown.他生于何时还不知道。