The document discusses relative clauses and their use in sentences. It defines defining and non-defining relative clauses and explains how they provide essential or extra information about a noun. It also covers the use of relative pronouns like who, that, which, whose, and whom in both defining and non-defining clauses, including when certain pronouns can be omitted. Examples are provided to illustrate the different types of relative clauses.

3. 1. Subject and Object Relative clauses give extra information about a noun in the main clause. They can refer to this as subject or object. “That’s the woman who bought my car” “That’s the flat that I was looking for” 2. Combining sentences Note how sentences are combined. Subject : “This is Sofia. She bought my car” “ Sofia is the person who bought my car” Object : “That is the flat. I was looking for it” “ That is the flat that I was looking for” SUBJECT OBJECT RELATIVE CLAUSES