The phrase "act proper" is correct and usable in written English.
It can be used to indicate that someone should behave in an appropriate or socially acceptable manner.
Example: "During the formal dinner, it is important to act proper and show respect to the guests."
Alternatives: "behave appropriately" or "conduct oneself properly".
When acting the confessor role, it is wise to act proper.
They'd say, 'You act white.' Or, 'You act proper.' " Ms. Jhingory had come face to face with the dilemma that many black youngsters encounter as they try to improve their lives by studying, going to college and making other efforts to escape the swarming tentacles of poverty and ignorance.
There are few days that I don't think of his notion of "panging" to other worlds, or fail to remember him hurling an actor against a wall and screaming in his all too imitable voice, like a whining exhaust pipe with a broken silencer, "Act proper!" Or recall his description of a certain kind of hyper-realistic performance as "tie acting".
If you didn't act proper, people wouldn't fear and respect you.
Feminine girls know how to act proper and well mannered in all situations.
Don't forget to throw off those inhibitions!! Culture today raises people with conditioning, teaching little kids at a young age to act proper and sit still.
Right now the US has 10 aircraft carriers able to act as proper mobile air bases.
SEES VICTORY FOR STATE Refuses to Discuss Simpson Plan -- Says Commission Will Act at Proper Time.
It is time for the United States to rise to its obligations as a world leader and act with proper humility.
They increasingly want these accounts to act like proper custody accounts, so that prime brokers have absolutely no claim over the assets in them.
"We should act in proper time, not to lose any momentum," he told reporters after meeting with the Egyptian president, Hosni Mubarak, in the Red Sea resort of Sharm el Sheik.
