The phrase "being primarily" is correct and usable in written English.
It can be used to indicate that something is mainly or chiefly in a particular state or condition.
Example: "The project is being primarily funded by private donations."
Alternatives: "mainly" or "chiefly".
"Myspace has moved from being primarily a social tool to a noticeboard," Ham says.
While being primarily scientists, we should reveal our artistic side occasionally.
It is likely an issue with the iPlayer app being primarily designed for a tablet or smartphone.
"The original was a balance of action and comedy, and the first one I approached as being primarily a thriller.
The transaction would transform CVS from being primarily a retailer to becoming the nation's preeminent manager of pharmacy benefits.
Being primarily versed in stand-up comedy he had a creative life of between three and four takes.
This production being primarily a showcase for Ms. De La Luz, she plays all of the above.
Being primarily about relationships, a cybernetic system is self-organising: if you block one route, information simply routes around you.
But with 13 Grand Slam titles — "back in the race" with Pete Sampras, as Federer said — he is again being primarily measured against the history book.
Rather than being primarily about good and evil, she said, "I think a lot of fantasy is an exploration of what power is".
Travel being primarily a business, there is, of course, a tendency to blame the news media for spreading bad news -- even when the news is bad indeed.
