The phrase "has proved capable" is correct and commonly used in written English.
It is typically used to describe someone's abilities or skills that have been demonstrated or confirmed in the past. Example: After months of hard work and dedication, Sarah has proved capable of handling complex tasks and is now considered one of the top performers in our team.
But it has proved capable of creating fear and havoc.
Throughout his career, Michael Dickinson has proved capable of extraordinary accomplishments.
He has won his last three starts and has proved capable of throwing in a spectacular effort.
The wish of Merkel's government to exercise power over Europe has proved capable of endangering the entire European project.
No government has proved capable of defeating this powerful coalition which exists to protect England's green and pleasant land.
On this planet, life has proved capable of thriving in unimaginably punishing conditions: without oxygen, without light, at four hundred degrees above or below zero.
The 6-3 Sue Wicks, who had what many said was her best pro season last year, has proven capable of shooting from the perimeter, posting up and playing defense.
What makes the 49ers offense so dangerous, is that even if the Ravens successfully stop the run, Kaepernick has proven capable of connecting with his receivers consistently from the pocket.
What Europe has proven capable of doing for its future graduates, it can and must do again today for its less qualified young people – inevitably the ones worst hit by unemployment.
Kerr and the Warriors assistant coach Alvin Gentry brought D'Antoni's system with them to the Bay Area nonetheless, and that is where it has proven capable of a crowning coup d'état.
Surprisingly, Jones has started three preseason games, led the team in minutes played, and has proven capable of defending three spots on the floor, from point guards to small forwards, while delighting Orlando fans with highlight-worthy dunks.
