The phrase "a very improper" is correct and usable in written English.
It can be used to describe something that is highly inappropriate or unacceptable in a particular context.
Example: "His behavior at the formal event was a very improper display of disrespect."
Alternatives: "quite inappropriate" or "extremely unseemly".
Don't put a capital in front of every word with an exclamation mark like this "Because It's Very Improper And Looks Like Your Grammatically Incorrect!" also it's really time wasting and pointless.
I asked him if he did not realise that his responsibilities as a journalist and an Englishman made the sending of such a message without definite authority as to its truth very improper and reckless".
The asterisk * refers to the following footnote by the translator (p. 9): Tho' this instance will serve to explain the meaning of the Author, yet 'tis very improper, because 'tis utterly impossible to give a Man that is born Blind, the least notion or idea of Light or Colours.
I think these are very improper questions for any American to be asked," Seeger replied.
"It would be very improper" if Bonds were suspended, Moss said, "because he would prejudice the legal proceeding.
"That is very improper," said attorney Michael Wright, who said that Ritchie's statement on what happened should have been based only on what he remembered seeing.
One is small in the scale of things; it's very improper for him to be out there commenting on monetary policy for personal gain, when his successor is new to the office and needs to establish his own credibility.
The British author James Kirkup, writing in The Independent, called him an "erotic crime specialist" and said, "His prose style is so individual, so slangy and often so very improper in its demented vocabulary that I wonder how anyone could transform it into acceptable English".
