Hello! 可以 is best translated as "may." It means you can do something in the sense that you have permission to do it. For example: 你可以自己选。(You may choose for yourself.) 你不可以逃棵。 (You may not skip class.) 会 means being able to do something that requires a certain skill or some kind of study to do. For example: 我会说中文。（I can speak Chinese.) 我不会开车。(I don't know how to drive.） 能 means having the physical ability to do something. For example: 我们只能继续工作。(The only thing we can do is continue working.) 我不能开门。(I can't open the door.) 能 can also relate to an ability based on time or availability: 我不能去，我得上课。(I can't go, I have to go to class.) 可能 means "maybe" or "possibility." For example: 他可能要去。(Maybe he will go.) 不可能吧！ (That's impossible!)

1.when I say 我会说中文， I mean I can speak .native speekers sometimes think that you a renot bad at it when you use "会" 2.when I say 我可以说中文， I mean I can speak it and you could choose to let me speak it or not，so it is not very common if you just want to tell him you only can speak a litte 3.when I say 我能说中文， yes，I have the ability to say something in Chinese 4..我可能说中文， we don't say this... but we say " 我可能说中文了" here l is a must ，mean 我中文说的非常非常好，very good at that

能，会，可以 都是肯定语气，表示你肯定告诉别人我能办到，我会办到，我可以办到；而可能是不确定的语气：表示我不一定办到。

ithought the first guy has clearified your questions clearly.?

能 = 可以 = can I can cook for you if u are tired. 会 = be able to I am able to cook ------- I have the ability of cooking. 可能 = maybe