The document discusses relative clauses and how pronouns are used within them. Relative pronouns like who and which take the place of pronouns like he or she and are not used together in a relative clause. In informal English, the relative pronoun is sometimes omitted entirely as in the example "I found the book you wanted."

6. The car belongs to the friend

9. In a relative clause, we do not use words like he or she after who or which. This is because who and which take the place of he or she Example: A man who he spends all his money is a fool. A man who spends all his money is a fool.

11. In informal English, we often leave out the relative pronoun . I found the book you wanted.

12. that’s all from me…thank you