Relative pronouns in both Italian and English introduce relative clauses, which are a type of dependent clause. Relative pronouns modify a word, idea, or phrase in the main clause. An example of a relative pronoun in English would be the word that: The book that I have written is available now. In the example sentence, that introduces a clause that is subordinate (…I have written) and which is dependent on the main clause (The book … is available now) .