The words ‘who’, ‘whom’, ‘which’, ‘whoever’, ‘whomever’, ‘whichever’, and ‘that’ are known as relative pronouns in the English language. A relative pronoun connects a phrase to a noun or pronoun. Thus ...

A relative clause can be used to give additional information about a noun. They are introduced by a relative pronoun like 'that', 'which', 'who', 'whose', 'where' and 'when'. For example: I won’t ...

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.