"has been vehemently" is a perfectly acceptable construction in written English.
You use it when an opinion or action has been expressed forcefully. For example: "The proposed policy has been vehemently opposed by citizens and environmental groups alike."
The move has been vehemently opposed by the orchestra's members, however.
"It has been vehemently independent," said Ms. Brown of Glasgow's art scene, "but there is a kind of growing up.
The proposal has been vehemently opposed by Russia, which like China fears the system would blunt its power and, like China, wants to avoid a costly arms race.
The Catholic Church has been vehemently opposed to removing Ms. Englaro's feeding tube, saying it was tantamount to euthanasia, which is illegal in Italy.
The so-called premium on-demand service by DirecTV, which allows customers to pay $30 to watch films two months after their theatrical release, has been vehemently opposed by theater owners.
The deal has been vehemently opposed by rivals, such as Warner Music and small independent music labels, which fear that Universal and Sony would dominate a market that is already under strain from illegal music downloads.
These reports have been vehemently denied.
Supporters hope the new system will produce more moderate candidates; political parties have been vehemently opposed.
Mr. Schwarzenegger's predecessor, Gray Davis, had been vehemently opposed to licensing illegal immigrants.
You had been vehemently opposing elections to the GTA until the issue of addition of new areas is resolved.
Her potential nomination had been vehemently opposed by Republicans who accused her of mishandling the Benghazi crisis.
