Are these correct?
I have as good a voice as you.
She is too polite a person to refuse.
How good a pianist is he?
I couldn't afford that big a car.
I wonder if they are old English.
Thank you.
***** NOT A TEACHER *****
Offroad,
(1) I believe that your first sentence does not qualify as
"old English." It is, I think, just an adverbial clause. Here is
an example from
Descriptive English Grammar by House & Harman:
(I have changed it slightly)
You are as small as I. = You are small in the degree in which I am small.
(2) Your other examples, according to
Harper's English Grammar by
Professor John B. Opdycke, would be labeled idioms, not "old English."
He explains:
Ear is the deciding factor in most such idioms.
He explains that the regular order
is grammatical, but English
speakers refuse to accept it. That is, it
is grammatical --according
to Dr. Opdycke -- to say:
She is
a too polite person to refuse.
A how good pianist is he?
I couldn't afford
a that big car.
But native speakers' ears consider such an arrangement as
(in Dr. Opdycke's words)
"awkward and ridiculous."
Here are some more examples of his:
How excellent a view.
So sweet a story.
Too great a sacrifice.
If you put those three in "regular" order, native speakers would
reject them as ungrammatical.
***** NOT A TEACHER *****