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.

“Every one of us have a role to play” or “Every one of us has a role to play”? “A bunch of students were waiting outside” or “a bunch of students was waiting outside”? “It is I who am here” or “It is ...

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 ...