Who vs Whom vs Whose: Questions and Relative Clauses Without Guessing

Who, whom and whose are easier when you stop memorising labels and ask what job the pronoun performs in the clause.

Who: the subject

Use who when the person performs the action.

• Who called you?
• The tutor who teaches this class is from Canada.

A quick test is to replace the word with he/she/they. If that works, who is likely correct.

Whom: the object

Traditional formal grammar uses whom when the person receives the action or follows a preposition.

• Whom did you invite?
• To whom should I send the form?

Replace it with him/her/them as a test. In everyday modern English, who is common instead of whom: Who did you invite? is completely natural.

Whose: possession

Whose asks or explains who something belongs to.

• Whose notebook is this?
• I met a student whose pronunciation improved quickly.

Prepositions and register

To whom did you speak? is formal. Who did you speak to? is normal conversation. Both can be correct; the difference is register, not intelligence or accuracy.

Quick practice

1. ___ sent the email?
2. ___ did the manager choose?
3. The learner ___ laptop was missing called support.
4. ___ are you waiting for?

Answers: Who; Whom/Who; whose; Who (natural everyday English).

Practical rule: use who for subjects, whose for possession, and reserve whom mainly for formal object positions where the style benefits from it.