The choice between who and whom depends on the pronoun’s job inside its clause. Who normally acts as a subject, while whom acts as the object of a verb or preposition.
In everyday American English, people often use who in object positions. That usage sounds natural, but the traditional distinction still matters in formal writing.
Quick Answer
Use who for the person doing the action:
- Who called the office?
- Maya is the employee who solved the problem.
Use whom for the person receiving the action or following a preposition in formal usage:
- Whom did the committee select?
- To whom should I send the form?
Try the he or him test. If he fits, choose who. If him fits, choose whom.
Why People Confuse Them
Both words refer to people and can introduce questions or clauses. The difference involves grammatical case, which modern English marks in only a few pronouns.
Confusion also grows because correct whom can sound stiff. “Whom did you invite?” follows the traditional rule, but “Who did you invite?” sounds more natural in conversation.
Key Differences At A Glance
| Feature | who | whom |
|---|---|---|
| Main role | Subject | Object |
| Comparable form | he, she, they | him, her, them |
| Common in speech | Yes | Less common |
| Formal writing | Standard | Standard when correct |
| After a fronted preposition | Usually not used | Preferred |
Meaning and Usage Difference
Who identifies the person performing an action or serving as a clause’s subject.
- Who approved the request?
- We need someone who understands the process.
Whom identifies the person affected by an action or serving as a preposition’s object.
- Whom did the manager recommend?
- The client with whom I spoke was helpful.
Check the pronoun’s role inside its smaller clause. In “The candidate who we believe will win,” who is correct because the candidate will win.
Tone, Context, and Formality
Who sounds natural in formal and informal English when it is the subject. It also commonly replaces object-form whom in relaxed usage.
Whom fits polished formal prose, especially after a preposition:
- To whom does this account belong?
- The attorney with whom we met sent an update.
Conversation usually moves the preposition to the end:
- Who does this account belong to?
- Who did we meet with?
Which One Should You Use?
| Context | Best Choice | Why |
| The person performs the action | who | It is the subject |
| The person receives the action in formal writing | whom | It is the object |
| A preposition comes directly before the pronoun | whom | The object form fits |
| Casual speech with the preposition at the end | who | It sounds natural |
| “Do you think” or similar words appear | Check the inner clause | The inserted words do not decide the form |
Rewrite the relevant clause when unsure. “Who do you think called?” becomes “He called.” “Whom do you think they called?” becomes “They called him.”
When One Choice Sounds Wrong
Using whom as a subject is a hypercorrection:
- Incorrect: Whom is leading the meeting?
- Correct: Who is leading the meeting?
The same rule applies in longer sentences:
- Incorrect: She is the analyst whom I think prepared the report.
- Correct: She is the analyst who I think prepared the report.
The analyst prepared the report, so the pronoun is the subject of prepared.
Common Mistakes (and Quick Fixes)
Choosing whom because it sounds formal: Use it only when the pronoun is an object.
Looking only at the previous word: In “It depends on who is available,” who is the subject of is available.
Testing the full sentence: Apply the he/him test to the pronoun’s own clause.
Forcing whom into casual writing: Move the preposition to the end and use who when that wording sounds clearer.
Everyday Examples
- Who left a message for me?
- Do you know who manages the branch?
- Who do you expect will arrive first?
- Whom should we contact about the invoice?
- The applicant whom the panel interviewed accepted the offer.
- For whom was the reservation made?
- Who were you talking to after the meeting?
- She is the designer who everyone says will lead the project.
Dictionary-Style Word Details
Verb
- who: Not used as a verb in standard US English.
- whom: Not used as a verb in standard US English.
Both words are pronouns.
Noun
- who: Not commonly used as a noun; it is an interrogative or relative pronoun.
- whom: Not commonly used as a noun; it is the objective form of who.
Synonyms
Neither word has a true one-word synonym for every context.
- who: Closest testing equivalents are he, she, or they.
- whom: Closest testing equivalents are him, her, or them.
These equivalents test grammar rather than replace the words directly.
Example Sentences
- who: Who scheduled the training session?
- who: The nurse who answered the call gave clear instructions.
- whom: Whom did the director appoint?
- whom: The professor from whom I requested feedback responded promptly.
Word History
- who: Comes from an Old English subject form referring to a person.
- whom: Comes from an Old English object-case form related to who.
The distinction survives, although everyday usage often favors who in object positions.
Phrases Containing
- who: “who knows,” “who goes there,” “who do you think”
- whom: “to whom it may concern,” “for whom,” “with whom”
Phrases with whom often sound formal because the preposition comes first.
FAQs
Yes, object-form who is common and widely accepted in ordinary American speech and informal writing. In formal documents, edited prose, or a grammar exercise, use whom when the pronoun is clearly the object of a verb or preposition.
Use whom when the preposition comes directly before the pronoun, as in “with whom” or “to whom.” When the preposition moves to the sentence’s end, everyday American English usually uses who, as in “Who did you speak with?”
No, whom is not outdated, but its use is limited. It appears most naturally in formal writing, fixed expressions, and sentences with a preposition placed before the pronoun. Many speakers avoid it in relaxed conversation because it can sound unusually formal.
Who is correct because it serves as the subject of “will win.” The words “do you think” form an inserted question and do not control the pronoun’s case. Remove them, and the structure becomes clear: “Who will win?”
Yes, whom can begin a question when it represents the object. “Whom did the board choose?” follows the traditional rule because the board chose that person. In everyday conversation, however, many Americans would naturally ask, “Who did the board choose?”
Choose the form that is both correct and natural for the sentence. Use who for subjects and whom after a fronted preposition in formal wording. For a friendly workplace email, an object-form who often sounds clearer and less stiff.
Conclusion
Use who when the person performs the action and whom when the person receives it or follows a preposition in formal wording.
Do not force whom into every object position, and never use it as a subject merely because it sounds polished.
