The phrase "able to perform his" is correct and usable in written English.
It can be used when discussing someone's capability or competence in carrying out a specific task or duty.
Example: "The technician is able to perform his responsibilities efficiently, ensuring that all equipment is functioning properly."
Alternatives: "capable of executing his" or "qualified to carry out his".
In his deposition, John Doe I also defended his actions, suggesting he was able to perform his job properly.
"Mr Van der Garde remains ready, willing and able to perform his obligations," Clarke told the court.
Could Simon continue working and earning a good wage if he were not able to perform his music or his work?
While nominally the army Chief of Staff under the new Communist Government, General Xu was in poor health and was not able to perform his full duties.
Dr. Chen said he would not be able to perform his job as a neurosurgeon were he to suffer a severe stroke, and his own advance directive specifies that a craniectomy should not be performed on him.
Two-thirds of Americans said they were not concerned about Mr. Cheney's being able to perform his responsibilities given his history of heart disease; one-third said they were concerned.
Jackman admitted whilst the number eight is physically back to his best, he will not be able to perform at his very best after missing out on game time.
But he is able to perform privately, his CDs are sold on the black market and, in an inexplicable twist, his songs are played on Iranian radio stations.
Speaking by telephone, Vaughn, who has not worked with Woods, said: "Tiger is someone who clearly has had the ability on the course to regulate his emotions, to handle the pressure and stresses so he is able to perform at his peak when it matters most.
"He was able to perform on his world record-holding TV programme The Sky at Night right up until the most recent episode.
He has cited plausible underlying reasons – the illness of his grandmother and his own exhaustion after a long season – and says that he was available but, mentally, would not be able to perform at his best.
