What引导的主语从句谓语要用单数吗

Question

如题所述

Answer 1

1, what 引导的主语从句作主语时，谓语的数由后面的表语或宾语确定。例如：
What she said is correct.
What he gave me are five English books.
2, 其它词引导的名词性从句作主语时，谓语用单数。 例如：
Who is responsible for the accidents is not clear.

Answer 2

是的，因为前面是一个整体

Answer 3

对