Let's say that you could go there again,how would you feel?
这是一种假设或者条件状语从句句.
== IF you could go there again,how would you feel?
翻译：如果你能再去的话,你会怎麼感觉?可以用will吗？nihao again.可以，但句子要重写了： IF you CAN go there again, how WILLyou feel? -------这是条件状语从句了。你的原始句是-----虚拟语气。