Put (one's) face on phrasal verb informal
To apply makeup or cosmetics
Wait a minute, I need to put my face on. I can't go out without makeup.
The process of putting on my face takes a lot of my time every morning.
Mary only leaves the house when she puts her face on.
The verb "put" should be conjugated according to its tense.
To decide to believe someone‘s saying although they may not tell the truth
He said that he was late because he had an accident and I gave him the benefit of the doubt.