Hi all,
I'm really fascinated by this hadn't have done structure.
My first thought was also the other one - wouldn't have done, and if I'm not mistaken, there are some confused conditionals used in America too, such as
"I wouldn't have done it if I wouldn't have done it.'
It seems to me that this little have is very important. Logically (as far as a language can be described as logical) hadn't have is total nonsense. Still, I think hadn't've (but perhaps not hadn't have) sounds good.
If there is anyone who can give us some more information about this interesting phenomenon, I'd be extremely happy to read it.
m