The phrase "has been very valuable" is correct and commonly used in written English.
It is often used to describe something or someone that has been helpful, beneficial, or important in the past and continues to hold value in the present. Example: "The advice given to me by my mentor has been very valuable throughout my career."
But a lot of people are in it for the money, and his knowledge of the Sahel has been very valuable to A.Q.I.M".
"I have no doubt the Olympic impetus has been very valuable," claimed Johnson, a ubiquitous presence during last year's Games – whether dangling from a zipwire or waving the flag.
Osbon: As a leading indicator, consumer confidence to the downside has been very valuable.
The mentorship has been very valuable for us, it's opened our eyes to certain ways of thinking," he said.
From years ago when he was a co-founder of Sun Microsystems to his current role as a venture capital investor at Khosla Ventures, his time has been very valuable for decades now.
These visits allowed me to gain a strong understanding of the manufacturing process, which has been very valuable as I now have insight into how I can design products that are easier to produce.
"Bob's extensive experience and broad range of contacts in the industry have been very valuable over the past three years," Mr. Thompson wrote.
Some of the earliest and biggest products in biotechnology were proteins derived directly from patented gene sequences, and these had been very valuable.
During the past decades, in situ observations on the ecliptic and at high heliographic latitudes have been very valuable to shed some light on the intricate nature of space plasma turbulence.
Coming from a prominent political family, Bush's ties to the Hispanic community have been very valuable to the Republican Party over the years.
