I'm not so I don't
I can't so I won't
I could but I shouldn't
But I can't so I wouldn't
I might but I can't
I've got so I don't
I would but I shouldn't
But I'm not so sure I couldn't
You didn't mean to not to
But you didn't 'cause you couldn't
But you wouldn't if you couldn't
And you might but you wouldn't