Identifying Relative Clause: da información extra para el significado de la oración principal. No va entre comas y es introducido por who, which, that, whose, where, when o the reason (why).
The man who sold me the car said it had never broken down.
The man who sold me the car said it had never broken down.
Non-Identifying Relative Clauses: da información extra y no es esencial para el significado de la oración principal. Va entre comas y es introducido por who, whom, which, where, whose o when.
The man, who was very persuasive, sold me the car for 1000€.
The man, who was very persuasive, sold me the car for 1000€.
