Would I, Should I, Could I???

I would if I could but I can’t
I will if I won’t yet I shan’t
If you tell me to do it I will
If I don’t want to do it I won’t
Should I do what you want me to do?
But I don’t think I should do do you?
I really would if you wanted me to
That’s If I knew what I had to do
So tell me if you think that I should
Then I’ll let you know if I would
I’m not even sure if I could
It depends if I’m in the right mood?