名词性从句中的连接词有连词that / whether / as if，连接代词what / who/ which / whose / whatever / whoever / whomever / whichever，连接副词where / when / why / how / wherever / whenever。
That they are good at English is known to us all.
The problem is that we don’t have enough money.
She expressed the hope that they would come to
He judged that,because he was a child, he did not understand
Everyone knew what happened and that she was worried.
The reason lies in that she works harder than the others do.