哪个是主语 主语从句whether引导

例句：Whether she will come or not is still a question.

这里有一个引导词whether，所以Whether she will come or not这部分是从句。

而这部分在句子里是主语，句子的谓语是is，表语是still a question

whether位于句首引导主语从句。例句：The jury is out on whether or not this is true.这是否属实尚无定论。It remains to be seen whether his project will fly.他的计划能否成功尚需拭目以待