在句子中起宾语作用的从句叫做宾语从句.宾语从句分为三类：动词的宾语从句,介词的宾语从句和形容词的宾语从句.
此句为形容词的宾语从句
常用来引导宾语从句的形容词有:sure,certain,glad,please,happy,sorry,afraid,satisfied,surprised I am sure I will pass the exam.我确信我会通过考试.
I am sorry that I have troubled you so long.很抱歉我这么长时间在打扰你.
He is glad that Li Ming went to see him when he was ill.他很高兴在他生病的时候李明能去看望他.