"If you were an adult, would you do the same?"
Firstly, I don't quite understand "were" here. Maybe "was" is needed here, because "you" is a singular noun?
Secondly, why we use would? Why not "will"?
Also, if my sentences sound quite weird, feel free to correct me. Thanks in advance!
The sentence is correct without considering any special context. The sentence is implying that it is being told to a child/teenager; someone who is not adult at the moment. The use of the word "would" is not wrong. The sentence is talking about a situation that does not exist and we're thinking about it hypothetically.
