6. Relative Pronouns - who, which, that, what


A relative pronoun is a pronoun that joins the clause which it introduces to its own antecedent. An antecedent of a pronoun is the noun to which it refers. The relative pronouns are who, which, that and what. The pronoun who has two other forms, whose and whom. When the relative pronoun is combined with ever or soever, it is called a compound relative pronoun.

Who is used when the antecedent is a person.
That is used to refer to either persons or things.
Which is used to refer to anything except persons.


List of Compound Relative Pronouns

whoever whomever whatever whosoever whatsoever whosoever whichsoever whomsoever whichever