The phrase 'has been energetic' is correct and usable in written English.
You can use it to talk about someone's energy or enthusiasm over a period of time. For example, "She has been energetic in her pursuit of a college degree."
The government has been energetic over reforms in defence, the intelligence services and criminal justice.
But Swift has been energetic in his defense, to say the least.
Pickles has been energetic in cutting the costs of his department this week.
The Bush administration has been energetic in the Caucasus, even as it vows not to micro-manage the Balkans or the Middle East.
A statement claiming the London bombs specified Rome as a target, calling it the seat of a "collaborating government" and "capital of the infidels".The government's response has been energetic, if less so than some would have liked.
Mr. Bloomberg, even if many of his constituents were unable to see or hear him through the normal media channels, has been energetic in trying to project calm in the face of adversity.
FOR almost half a decade the world's big central banks have been energetic paramedics to their sickly economies.
Those examinations of America's myth-making have been energetic and eager, but also chaotic and undisciplined.
The Chinese had also been pleased by his association with Bain Capital, which had been energetic in trying to assist Chinese companies buy American technology firms.
Where the hosts had dawdled through the opening period, trailing to a slickly constructed Charlie Adam goal, Gayle had been energetic and eager.
So far, both the F.B.I. and the State Department say, the Yemenis have been energetic in finding answers to the first issue in the bombing: how it was done.
