to sb's face.
例如:
我太生气了,我一定要当面告诉她我对她的看法.
I am so angry that I'll tell her to her face what I think of her.
in sb.'s presence
例如:
你不应该当面这么严厉地批评他.
You should not criticize him so harshly in his presence.
in sb's face
例如:每当谈到我开车违章判罪问题时,我妻子忍不住要以此事当面责备我.
Every time the subject of my motoring conviction comes up my wife can't help throwing it in my face.