Recently, I came across a sentence starting with Would that. By searching over ELL stackexchange I found here that would that is an obsolete way of saying if this was true. Now what came to my mind is that we sometimes start a sentence with had to mean the same thing, e.g.
Had I been a millionaire.
My question is can we use the following types of constructions:
- Had that I were a millionaire.
- Had it been that I were a millionaire
Does both of them convey the same meaning?