Hi Mikkel So, to ask that question, I would ask it in the positive form: "When are you inc lass?" If you want to ask it in a negative style (When not in class), I would use of these: "When are you not in class?" "When are you free?"

US: When do classes get out? When does your class get out? When does your class let out? What time do you get off? (this can be a double entendre - but it's your wife :) so it's ok.) When are you out of class? When's your class over? for a school (not so much the type of class she's taking, but maybe for future use) What time does the bell ring?

Understandable, yes. Natural, no, not at all. I would say one of: When does the class finish? What time does the class finish?

Just to add a few other ways to express it: "What time is class over ? "When do you get out off class?" What time does class finish ? " So many ways to express this ! Just pick one that is easy to remember for you