Could you explain how "would" works in the following sentence? Speaker asks a question, then speaker B uses "would" when replying to the question. I'd really like to understand its use.
A: Which questions are more natural to express the period of time 'an hour and a half' in the answer? I am with all of them.
- How long will you spend at the gym?
- How much time will you spend at the gym? I will spend an hour and a half. Is it 'for' optional in the answer?
- How long will you be at the gym? I'll be there (for) an hour and a half
B: To me, the most natural is #3. Another natural question would be: 'How long are you going to be at the gym?' And the most natural answer, in my opinion, would be simply, 'An hour and a half'.