* Formal: I am acquainted with the new regulations.
* Informal: We became acquainted at a party last week.
* Descriptive: The detective was acquainted with the city's criminal underworld.
* Question: Are you acquainted with the latest developments in artificial intelligence?
You can also use "acquainted with" to indicate familiarity with something:
* I'm not acquainted with that software program.
* He is well acquainted with the history of the region.