I am ashamed of you.(我为你感到惭愧)
You should be ashamed.(你应该感到惭愧)
Shame on you!(你真惭愧/丢脸!)
It was shameful that he became a traitor.
(他成了叛徒,这太惭愧了/太丢脸了)
对自己:
i'm sorry. 万能型。可以加一些东西,如 i'm so sorry.等。
对别人:
i feel sorry for you.
i am ashamed of you.
shame on you.
主要就是 sorry 和 shame,ashame 了。
I'm sorry about that!
I am awfully sorry.
I must admit to feeling ashamed.
我得承认我感到惭愧。