perhaps与possibly的区别

如题。

possibly：“可能地，或者，也许"，可能性较大。用于否定句和疑问句时表示 "无论如何"之意。
She expressed regret for any inconvenience which might possibly be caused.
她为任何可能造成的不便而深表歉意。
I couldn't possibly have finished typing such a long document in such a limited period of time. 无论如何，我也不可能在如此有限的时间内打完这么长的文件。

perhaps：“可能”，较为常用也较为正式的词，可能性也不十分大。它可以表示建议或要求，也可以表示以礼貌的方式下命令。
I thought perhaps it was the letter you had been expecting. 我想这大概是你一直盼望的那封信。
Perhaps you will kindly give us a hand when we are in trouble. 当我们陷入困境时，也许你会善意地帮我们一把。