English Grammar

Interrogative Pronouns

The pronouns who, whom, whose, what and which are called interrogative pronouns because they are used for asking questions.

Who is he?
What did you do then?
Whom do you want?
Which is the road to the railway station?
Whose is this pen?

Who has different forms for the different cases: who (nominative), whose (possessive), whom (objective). What and which remain unchanged in all cases.