A relative pronoun is one which is used to refer to nouns mentioned previously, whether they are people, places, things, animals, or ideas. Relative pronouns can be used to join two sentences.
There are only a few relative pronouns in the English language. The most common are which, that, whose, whoever, whomever, who, and whom. In some situations, the words what, when, and where can also function as relative pronouns. Because there are only a few of them, there are also just a few rules for using relative pronouns. Keep them in mind as you write.
The following sentences contain examples of relative pronouns. The relative pronoun in each example is italicized.