"concern has proved" is a correct and usable phrase in written English.
It is usually used to refer to previously established facts or evidence being accepted. For example, "Concern over the impact of climate change has proved to be well-founded."
For many, the concern has proved real.
"Masses of people are concerned with their single life histories and particular emotion as never before; this concern has proved to be a trap rather than a liberation," he wrote.
Some of Jung's writings have been devoted to elucidating some of the archetypal symbols, and his work in comparative mythology, the history of alchemy, and other similar areas of concern has proved greatly influential in stimulating the investigations of other interested scholars.
Yet, identifying appropriate, effective, and brief interventions to address those concerns has proven elusive.
The latter of these concerns has proven to be unfounded.
Moreover, the outermost layers of those scrolls examined, and thus the beginnings of the books concerned, have proved too delicate for any technique before Dr Mocella's to recover.
While genomics companies may have an edge in the research phase of producing a new therapy, mature biotechnology and large pharmaceutical concerns have proved their ability to develop, manufacture and market drugs.
Two terms into her job as head of school at Woodwater Academy, a primary in Exeter and one of 13 schools in the Children First Federation, Leeson says her concerns have proved groundless.
Abstraction and separation of concerns have proven their worth time and again in dealing with and breaking down complexities and inconsistencies in very large and distributed systems.
