ABSTRACT
In the sentence 'I saw the man who broke his leg', the relative pronoun 'who' refers back to the definite noun "the man', and functions as the subject of the verb 'broke' in the relative clause 'who broke his leg'.
In the sentence 'I saw the man who broke his leg', the relative pronoun 'who' refers back to the definite noun "the man', and functions as the subject of the verb 'broke' in the relative clause 'who broke his leg'.