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 ...

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.

The preceding chapter showed how sentences can be streamlined by reducing their adjective clauses to adjective phrases — a simple process that omits the relative pronouns “that,” “which,” “who,” “whom ...