I want grammar relative clause

A relative clause is a type of dependent clause that modifies a noun or noun phrase. It provides additional information about the noun it follows. Relative clauses typically begin with a relative pronoun (who, whom, whose, which, that) or a relative adverb (where, when, why).

There are two main types of relative clauses:

1. Defining relative clauses: These are essential to the meaning of the sentence. They identify which specific person or thing is being talked about. They are not set off by commas.

   • Example: The book that I am reading is very interesting. (This tells us which book is interesting.)

2. Non-defining relative clauses: These provide extra, non-essential information about a noun that is already clearly identified. They are set off by commas.

   • Example: My brother, who lives in London, is visiting next week. (We already know which brother; the clause just adds extra information.)