say sorry to ,be sorry to,be sorry for
say sorry to表示“向……表示道歉（歉意）”的意思,sorry是名词,to是介词,其后接表示人的名词或代词.例如：I'd say sorry to you,I must go.我要向诸位表示歉意,我得走了.Don't scold him,he had said sorry to us.不要责备他了,他已经向我们道歉了.
be sorry to和be sorry for都表示“由于……而感到遗憾”的意思,其中sorry均为形容词.不同的是前者接动词原形,后者接名词或动名词.例如：I'm sorry to hear his failure.听说他失败了,我感到很遗憾.I'm sorry for giving so much trouble.对不起,给你添了这么多麻烦.
1 表示难过的惋惜的sorry for+人,sorry about+物
例如：I felt sorry for her in her great trouble.
I am sorry about his misfortune.
2 表抱歉 后悔而这均可,可以互换.
I am sorry for/abour what I said.
3 for 可以加动名词,about不可
I am sorry for troubling you.
以上.