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.

1. Relative clauses are “embedded” grammatical structures, contained inside other grammatical structures. 2. Relative clauses play a central role in English discourse. 3. Relative clause knowledge is ...

USING relative clauses is a very convenient way to load sentences with more information. They do their job quite well when only one or two of relative clauses are involved, as in this sentence: "The ...