When you ask for things, it is important to be polite. The intonation that you use in making your request is as important as what you actually say. When you think someone will refuse your request, you can ask the question in such a way that the refusal does not cause embarrassment.
1. A: Is there any chance of my borrowing your type-writer?
B: For how long?
A: Until the end of the week.
B: Yes, I guess that would be all right.
2. A: Would you mind if I borrowed your car?
B: Well, when exactly?
A: Until Monday or Tuesday of next week.
B: I'm sorry, but it's just not possible.
3. A: Do you think you could lend me some of your records?
B: Until when?
A: Oh, just over the holidays.
B: I'm not sure. I'll have to think about it.
4. A: I was wondering if you'd let me stay with you for a few days.
B: It really depends on when.
A: Until next weekend, if that's OK.
B: Let me think it over, and I'll let you know later.