简单的主语从句例句：
It is said that he will come tomorrow.(that引导主语从句)译：据说他明天来。
It is possible that he will translate the article.(that引导主语从句)译：他可能会翻译这篇文章。
What he said was true.(what引导主语从句)译：他说的是真的。
How we will finish the work is being discussed.(how引导主语从句)译：我们怎样完成工作还在讨论中。
Whether he had done it was a puzzle.(whether引导主语从句)译：他是不是做了这件事还是个迷。
Where he lives has been told to us.(where引导主语从句)译：已经告知我们他住在哪。
Who will come is still not known.(who引导主语从句) 译：谁会来还不知道。
Whoever leaves the lab last should turn off the lights.(whoever引导主语从句)译：不管是谁最后离开实验室都应该关灯。
When he will fly to New York has been known.(when引导主语从句) 译：已经知道他什么时候飞纽约了。