When will you / are you going see Brian? There is a part of an excercise form my textbook, whose content I have changed a little to avoid copy rights. I am wondering which question from these mentioned in the question subject should I use. I think the will version is better, because I was told that 'will' may be used when you want somebody to make a commitment - that is why you sometimes use 'When will you be paying your rent' insead of 'When will you pay...' From what I know, question with 'going to' asks about something that is planned. Therefore this will be a kind of weird to ask the suspect when he is going to see Brain because the policeman assumes that the suspect has already arranged a meeting. POLICEMAN: Was anyone with you? SUSPECT: I was with my best friend Brian Hey. POLICEMAN: What did you do after that? SUSPECT: After that? We both went to a restaurant. POLICEMAN: What did you eat ? SUSPECT: We took the same. Large chips and a medium coke. POLICEMAN: Do you meet each other often? SUSPECT: No, not very often. We only meet each other every two weeks. POLICEMAN: ........................... ? SUSPECT: Tomorrow, sir. I will certainly see Brain tomorrow.