Shame on you 真可耻，不要脸
Fool me once, shame on you. Fool me twice, shame on me.
Shame on you for not helping her!
Lose face 丢脸，丢面子
He thinks he would lose face if he admitted the mistake.
One's face falls 脸沉了下来
My boss's face fell when he knew I was late for the meeting.
Get out of my face! 走开！别烦我！
Get out of my face—I don't have time for this nonsense.
On the face of it 表面来看
This looks like a serious problem on the face of it. It probably is minor, however.