对谁谁感到报歉..怎么说

I feel sorry for sb.
我对某人感到报歉

I feel really bad about...
我对(某件事)感到非常抱歉。

对人感到抱歉
feel sorry toward + 宾语
例句：She feels sorry toward her friend. (她对她的朋友感到抱歉)

对事情感到抱歉
feel sorry for + 动名词
例句：She feels sorry for committing the crime. (她对所犯下的罪行感到抱歉)

I'm so sorry

sorry, my bad

I'm really sorry/bad/guilty

pardon me

I feel bad about ...

feel guilty

so sorry`

才是标准的口语

Oh .sorry

I'm sorry.