You are a professional, but I am an amateur.
The professional skier liked to "hot-dog" down the mountain.
His singing outdoes a professional.
His karaoke voice would put a professional to shame.
Playing country-western music on guitar is real kid stuff to a true professional.
This work would do credit to a professional.
The house is being painted by a professional.
The garden has been professionally laid out.
Because of his great professional skill, the lawyer has a large number of clients.
Florence Nightingale is famous as the woman who began professional nursing.