it won't take us much time to do it,i think.改写.

问题描述:

it won't take us much time to do it,i think.改写.
i don't think it will take us much time.
为什么不能把will 换成would.
求救.

如果换成would则答案中的don't应替换为didn't,would是指过去的将来 而原句则显然是现在的将来