Interrogative pronouns are used to ask questions.

There are four main interrogative pronouns - who, whom, what, and which. The possessive pronoun whose can also be an interrogative pronoun.

Examples:

• Who saw him?

- refers to a person used as a subject in a sentence

• Whom did you give the letter to?

- refers to a person used as an object in a sentence

• What did you buy?

- refers to a thing

• Whose key did you find?

- refers to a person that shows possession

• Which are the items you chose?

- refers to a person or a thing that has to be singled out from a number of choices

Remember not to confuse interrogative pronouns with relative pronouns.

An interrogative pronoun is used in order to ask a question. It has no antecedent.

Who came first in class?
Who has no antecedent.

A relative pronoun refers to an antecedent and begins an adjective clause.

Tina is the girl who came first in class.
The antecedent of who is girl.