Question

what可以在陈述句中单独做主语吗？比如What is a fact that she won.

Answer 1

这个应该是 It is a fact that she won. 这是一个强调句型 It is ...that.... 将强调部分放在 It is 后，剩余部分照抄至that后面 此句强调 她赢这是一个【事实】
What 不能在陈述句中独立作主语，而是通过what引导的主语从句整体来做主语，如：What is known to us is that his performance is amazing. 这句中What......to us是主语，is 是谓语，that引导表语从句。