Who vs Whom: What's the Difference?

Who vs Whom: What's the Difference?

Quick Answer

"Who" is used as the subject of a clause (the doer), while "whom" is used as the object (the receiver) — think "who does?" vs "whom is it done to?"

Definition: "Who"

"Who" is an interrogative and relative pronoun used to ask about or refer to the subject of a verb. It replaces a person performing an action: Who called? The person who called is here.

Etymology: "Who" comes from Old English hwa, related to German wer and Dutch wie. It’s been asking about people for centuries.

Definition: "Whom"

"Whom" is also an interrogative and relative pronoun, but it refers to the object of a verb or preposition. Use it when the person is receiving the action: Whom did you see? I saw the woman whom you mentioned.

Etymology: "Whom" derives from Old English hwām (dative) and hwone (accusative), reflecting case endings that English has mostly lost except for pronouns.

Key Differences

Example Sentences — "Who"

• Who left their umbrella in the hallway?
• Do you know who is joining the meeting later?
• The teacher, who loves puzzles, assigned a tricky exercise.
• Whoever wins the contest will be invited to present.

Example Sentences — "Whom"

• Whom did you ask about the password?
• The artist, whom the critics praised, sold out the show.
• To whom should I address this letter?
• She couldn't remember whom she had called last night.

Memory Trick

Use the "him" test: replace the question word with "he" or "him." If "he" fits, use "who." If "him" fits, use "whom." Example: "_____ did you see?" Try "He did you see?" (no) vs "Him did you see?" (yes → whom).

Another quick mnemonic: "Who = he (subject), Whom = him (object)." Keep the rhyme in your head: who/he, whom/him.

Quick Quiz

1. _____ is coming to dinner tonight? (who/whom)
2. _____ did you invite to the party? (who/whom)
3. To _____ should I send the invoice? (who/whom)
4. The author _____ I admire will speak tomorrow. (who/whom)

Answers

1. Who is coming to dinner tonight? ("who" = subject)
2. Whom did you invite to the party? ("whom" = object of invite)
3. To whom should I send the invoice? ("whom" = object of preposition "to")
4. The author whom I admire will speak tomorrow. ("whom" = object of admire)

Actionable Tips to Stop Hesitating

1. Ask the question as a short sentence with a blank: "_____ did this?" Replace with he/him to check quickly.

2. If the pronoun follows a preposition (to, for, with, by), default to "whom." For example, "for whom" and "with whom" are safe.

3. For casual speech, "who" is often accepted, but in formal writing or job applications, use "whom" correctly to show polish.

Want practice? Use a writing tool to check examples. Rephrasely’s AI writer and paraphraser can create varied sample sentences, while the AI detector and plagiarism checker help ensure originality. Try composing sample questions with the composer and then verify with the /ai-detector and /plagiarism-checker. Visit Rephrasely to get started: Rephrasely. You can also try the composer at /composer.

Frequently Asked Questions

Is "whom" old-fashioned?

It can sound formal or old-fashioned in casual speech. Many native speakers use "who" in everyday conversation, but "whom" remains correct and useful in formal writing and after prepositions.

Can I always replace "whom" with "who"?

In casual contexts you can often use "who" without confusion, but don't in formal writing if the pronoun is an object. Use the "he/him" test or a grammar checker like Rephrasely's tools to be confident.

How do I practice choosing correctly?

Make a short list of question patterns and test them with the he/him trick. Then run your sentences through Rephrasely’s AI writer to generate alternatives, and double-check with the /ai-detector or /plagiarism-checker if you need verification.