Adjective Subordinate Clauses: How We Distinguish and Analyze Them

In the language test of the selectivity (PAU) there is always an exercise dedicated to subordinate adjective or relative clauses. Let's see how to detect them, how to classify them and how to determine their function. How do we detect them? All subordinate adjective clauses are headed by a relative pronoun, which can be which, which… or another that we can replace with which, which… (that, what, who, where…) —I saw the boy who came yesterday = I…