probably possibly maybe perhaps 等词可能性的排序

maybe, possibly, perhaps, probably

这四个词都可表示“可能性”。

maybe：“可能，也许”，比其余的几个词更为随便和不正式，可能性不大，也可以表示一种非常委婉,礼貌的建议或要求。如：You could put it over there, maybe. 也许你可以把它搁在那边。
He didn't feel quite right; maybe he got sunstroke. 他觉得不太好；也许是有点中暑。
The doctor thinks maybe we'd better have a minor operation. 医生认为也许我们最好做个小手术。

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。

probably：“很可能，大概”，可能性在这一组词中最大，表示一种几乎完全肯定的意思。
He is the only witness of the accid