Who vs Whom: Examples & How to Fix It
Use who for the subject (the one doing the action) and whom for the object (the one receiving it). Quick test: if the answer is “he/she/they”, use who; if the answer is “him/her/them”, use whom. Paste your own sentence into the free checker below to fix it in one click.
Use who for the subject (the one doing the action) and whom for the object (the one receiving it). Quick test: if the answer is “he/she/they”, use who; if the answer is “him/her/them”, use whom.
How it works
- 1Spot the pattern. Rephrase as a statement and answer with a pronoun. “Who/whom did you call?” → “I called him” → him ends in “m”, so use whom.
- 2Apply the rule. Match the m’s: if “him/them” answers the question, use whom; if “he/they” answers it, use who. After a preposition (“to ___”, “for ___”), it is almost always whom.
- 3Check your sentence. Paste your text into the grammar checker below — it flags the issue and shows the correction.
- 4Re-read it. Read the corrected version aloud to confirm it says exactly what you meant.
The rule
Who is a subject pronoun (like he, she, they); whom is an object pronoun (like him, her, them). The role the word plays in the sentence decides which to use.
How to spot it
Rephrase as a statement and answer with a pronoun. “Who/whom did you call?” → “I called him” → him ends in “m”, so use whom.
How to fix it
Match the m’s: if “him/them” answers the question, use whom; if “he/they” answers it, use who. After a preposition (“to ___”, “for ___”), it is almost always whom.
The most common mistake
Using “whom” everywhere to sound formal, even where it’s the subject — “Whom is calling?” should be “Who is calling?” If you’re not sure whether your sentence has the problem, paste it into the checker above — it catches this and explains the fix in plain language.
| ❌ Incorrect | ✓ Corrected | Why |
|---|---|---|
| Whom is at the door? | Who is at the door? | Subject = who (she is) |
| Who should I ask? | Whom should I ask? | Object = whom (ask him) |
| To who should I address this? | To whom should I address this? | After a preposition = whom |
Frequently asked questions
Who vs whom — how do I choose?
Answer with he/him: if “he” fits, use who; if “him” fits, use whom (both end in “m”). “Who called?” (he called); “Whom did you call?” (called him).
Is “whom” becoming outdated?
In casual speech many people use “who” throughout. In formal and academic writing the who/whom distinction still matters, especially after prepositions (“to whom”).
How do I check my own writing for this?
Paste your text into the free grammar checker on this page. It flags the issue, suggests a correction, and explains why — so you learn the rule, not just the fix.
Is it free?
Yes — sign up free and you get 1,000 free words in your first month, then 300 every month, no card. The AI detector is free for up to 300 words and needs no account. Paid plans add a bigger monthly allowance, longer single runs, and every PRO style.