Is there any probability of his coming? 他有可能来吗?
It lacks probability. 不可能发生这事
There is every [no] probability that he will take our side. 他很可能[根本不可能]站在我们一边
There is a (=some) probability that school will close a week earlier than usual. 学校可能比通常提早一周放假.

It is a probability. 很可能有这种事
The probability is that she'll forget it. 她很可能会忘记那件事
The probabilities are against us [in our favor]. 趋势好像对我们不利[有利].