介紹：

Save face 保住面子
to keep your reputation and avoid others losing respect for you.
I was late for the meeting but tried to save face by blaming an urgent call.
我開會遲到了，于是裝作責怪有緊急電話來挽回面子。

Make a face 做鬼臉
The teacher scolded Jimmy for making faces at her from the back of class.
老師責備Jimmy坐在教室后排給她做鬼臉。

Get out of my face!
從我面前消失！
If this guy doesn't get out of my face soon, I'm going to call security.
如果這人不從我面前消失，我就要打電話叫保安了。

Sb's face falls
臉沉了下來
Her face fell when she heard he wasn't coming.
她聽說他不來時臉沉了下來。

Be written all over (one's) face
滿臉都是...
Jenny said she wasn't scared before we went into the haunted house, but terror was written all over her face.
我們進入鬼屋之前Jenny說自己不害怕。但是進去后她滿臉都是恐懼。