Interrogative pronouns are used in asking questions. There are five of them, all of which begin with wh-: who, whom, whose, which, what. Who is used for people while which and what are used for things. These pronouns do not have gender.
The following sentences show interrogative pronouns being used to ask questions:
- Who are you shouting at?
- Who is that person?
- Whom are you staying with?
- Whom do you wish to speak to?
- What is your address?
- What are you going to do?
- Which of these colours do you like?
- Which do you think is better?
- Whose is that car?
- Whose are those children?
Who is the subject pronoun while whom is the object pronoun. See the following sentences:
- Who ate my pizza?
- Which costs more than my car?
- What caused her sickness?
- Whose baby is crying loudly?
- Which of the author's books have you read?
- What does he complain of the whole day?
- Whom did you borrow that book from?
- Which did you throw away?
- What have you planned to do this weekend?
Who as mentioned above is the subject pronoun. It can however be used as the object of a verb.
Who opened the gate? (as the subject)
Who are you inviting to your party? (as the object)
Who is she smiling at? (as the object of a preposition)
Whom is used as the object of a preposition. Prepositions used here: about, of, to.
Whom are you worried about?
Whom are you drawing pictures of?
Whom have you addressed the letter to?
The preposition can come at the beginning of the interrogative pronoun.
- About whom are you worried?
- Ofwhom are you drawing pictures?
- To whom have you addressed the letter?
It's wrong to repeat the preposition as in the following interrogative pronoun.
Incorrect: To whom have you addressed the letter to?
Whom cannot be used as the subject (of a verb).
Incorrect: Whom beat him up yesterday?
Correct: Who beat him up yesterday?