不是表语从句,是宾语从句,例如:
1.I am sorry that I forgot to buy the milk.对不起,我忘了买牛奶。
2.I am sorry that he should be so half-hearted about the important work.我很遗憾,他对这项重要工作竟这样敷衍塞责。
3.I am sorry that I broke my promise.对不起,我失信了。