Who vs. Whom: Differences, Rules, and Examples

by

Who vs. whom is one of the most confusing grammar points in English writing. Many learners struggle to choose the correct form, especially in questions, relative clauses, and sentences with prepositions. The key difference depends on whether the pronoun functions as a subject or an object, not on how formal the sentence sounds.

This guide explains the rules for using who and whom, introduces the simple he / him test, and provides clear examples, comparisons, and practice questions to help you use both forms accurately in formal and informal English.

Who vs. Whom

Who vs Whom grammar rules with clear sentence examples

Difference between Who and Whom

The difference between who and whom depends on their grammatical function in a clause:

  • Who is used as a subject (the person who performs the action).
  • Whom is used as an object (the person who receives the action).

The He / Him Rule

If you are unsure whether to use who or whom, try this simple replacement rule:

  • If you can replace the word with he, use who.
  • If you can replace the word with him, use whom.

Examples:

  • ___ is calling me? → He is calling me. → Who is calling me?
  • ___ did you invite? → I invited him. → Whom did you invite?

Using Who and Whom in Sentences

Who (Subject Pronoun)

Use who when the pronoun is the subject of a clause.

  • Who ate all the cookies?
  • Who is the best candidate for the job?
  • Who is responsible for the mistake?

Whom (Object Pronoun)

Use whom when the pronoun is the object of a verb or a preposition.

  • Whom did you invite to the meeting?
  • To whom should I address the letter?
  • With whom are you working?

Who vs. Whom in Relative Clauses

Relative clauses often cause confusion. Focus on the role of the pronoun inside the relative clause.

  • The woman who is wearing a red dress is my sister. (who = subject)
  • The woman whom I met at the party is a doctor. (whom = object of “met”)

Note: In informal English, many speakers say “The woman who I met …”. This is common in conversation, but whom is preferred in formal writing.

Who vs. Whom with Prepositions

When a pronoun comes directly after a preposition, whom is the correct choice in formal English.

  • To whom it may concern
  • From whom did you receive the email?

In informal speech, it is common to move the preposition to the end:

  • Who did you give the book to?

Who vs Whom comparison chart for subject and object usage

Last Updated on January 22, 2026

Like or AsLike or As: Usage and Key Differences Despite vs. Although: How to Use Despite vs Although Correctly?Despite vs. Although: How to Use Them Correctly In Case or Incase? The Simple Rule to Never Mix Them Up Race vs. Ethnicity: What’s the Real Difference?

3 thoughts on “Who vs. Whom: Differences, Rules, and Examples”

    • We use “whom” when referring to the object of a verb or preposition, not the subject. A simple trick is to try replacing it with “him” or “her”—if that sounds right, then “whom” is likely correct. Example:

      To whom did you speak? (You spoke to him → “whom” is correct.)
      The person whom I met was very kind. (I met him → “whom” is correct.)

      Thanks for learning with us—keep the great questions coming! 😊

      Reply

Leave a Comment

222