An essential relative clause provides necessary, defining information about the noun. On the other hand, non‐ essential relative clauses provide additional, non‐necessary information about the noun.

Save guides, add subjects and pick up where you left off with your BBC account. A relative clause can be used to give additional information about a noun. They are introduced by a relative pronoun ...

Save guides, add subjects and pick up where you left off with your BBC account. A relative clause can be used to give additional information about a noun. They are introduced by a relative pronoun ...