—Where（ ）? —I got stuck in the heavy traffic.Otherwise I（ ）here earlier

have you been 表示你去了哪里?用现在完成时..因为现在你已经在我面前了...
would 表可能。

where have you been? 你到那里去了?

otherwise I would have been 不然我应该已经...

A. 的did you go. 勉强可以. 不过是小孩的英文语法. had arrived 的had 是肯定不行的. 可以是 have arrived.

Where have you been 你都跑哪去啦？
Where didi you go 你那时候是去那里呢？（这样问问题得不出实质性答案，因为那时去一个地方，但真正耽误时间是在另一个地方）
I would have been 我将已经...(虚拟将来完成时)一定要有将来的成分，因为那个回答里面说的都是过去的，过去相对于现在当然就是将来啦

希望能帮到你呵呵。

Where have you been ？你到哪里去了 Otherwise I would have been here earlier 否则的话我早就已经到这里了。