The phrase "had been possibly" is correct and usable in written English.
It can be used to indicate uncertainty about a past event or situation.
Example: "The results of the experiment had been possibly influenced by external factors."
Alternatives: "might have been" or "could have been".
I hadn't known that "Shamela" was only one of many works published in immediate response to "Pamela," and that "Pamela," indeed, had been possibly the biggest news of any kind in London in 1741.
Giving evidence to the Work and Pensions Committee, minister for pensions Steve Webb said that so far under auto-enrolment competition among pension providers to provide schemes for large employers had been "possibly fiercer than had been imagined".
The fact that the bodyguard was not present when the gang struck has raised speculation in Paris that the thieves had either been trailing and observing Kardashian West extremely closely and took advantage of her lack of security at that moment, or they had been possibly tipped off by somebody close to the star's entourage that he was not there.
But another commuter, Chris Aldridge, said his trip on the District line had been "possibly the quietest and quickest journey" he had ever taken to work.
Ivo Watts-Russell stated if Black Francis had been possibly persuaded to release the version of the song recorded during the session for the "Gigantic" single which he described as "totally streamlined and ready for radio"—that "maybe if a major label company was able to convince people to take a more commercial route, maybe Pixies would have sold a whole bunch more records than they did.
This study has the following limitations; social desirability bias secondary to sensitivity of the information had been possibly encountered, temporary site and occupation change by the participants could also happen during the data collection period.
That English rugby's one great triumph was delivered by the most socially diverse collection of players it has ever had is possibly a coincidence.
But the trouble with the law is that it acts after the harm has been done, after the prejudice has occurred and the trial has been possibly compromised.
David Johnson has been possibly the most impressive back in the league, thriving despite a porous offensive line, and the defense is giving up the fewest yards of anybody.
THE political partnership between John Howard, Australia's prime minister, and Peter Costello, the treasurer (finance minister), has been possibly the most successful the country has seen.
This minor weight loss could be interpreted as formed/trapped atmospheric gases available in atmosphere, which has been possibly release on heating.
