I’m going to Europe on vacation together with John if I can find the mon-ey. (现在的能力) 如果我现在能有钱,我将和约翰一起去欧洲度假。 If you have a good sleep,you will be able to work out this problem.(将来的能力) 如果你好好睡一觉,你将能够解出这道题。