He doesn’t know what she likes. 他不知道她喜欢什么。
What you say is quite right. 你所说的相当正确。
I believe (that) he will come to see us. 我相信他会来看我们的。
It’s a pity (that) he didn’t finish college. 真遗憾他大学没毕业。
另外,that 可引导同位语从句,但 what 通常不用于引导同位语从句。如:
I had no idea that you were here. 我不知道你在这儿。 更多高考信息》》》新东方网高考频道 新东方报名系统》》》我要报班