I need to create a questionnaire. I have a question with double-choice answer "YES/NO". I want the interviewee to answer:
Yes: if the interviewee is currently having lunch or the user has already had lunch
No: if the interviewee hasn't had lunch yet
A possible question might be: "Did you start your lunch yet?"
Did you think the question would be appropriate and grammatically correct? Would you use another expression? I want the most concise question possible (ideally no subordinates), and I also want it to be clear. Please note that the interviewees would be American not British.
I think other expressions such as "Have you had your lunch yet?" are not completely correct given my requirements.