Academic Writing

Who and Whom

The Humanize Team · 13 Jun 2026 · 5 min read
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Navigating the nuances of English grammar can sometimes feel like deciphering a secret code. Among the most commonly confused pairs are "who" and "whom." While they sound similar and are both pronouns referring to people, their grammatical roles are distinct. Mastering this distinction will significantly elevate the clarity and correctness of your writing, whether you're drafting an academic essay, a professional email, or even a casual conversation.

The Core Difference: Subject vs. Object

At its heart, the difference between "who" and "whom" boils down to their function in a sentence:

  • Who is a subject pronoun. It performs the action of the verb. Think of it as the equivalent of "he," "she," or "they" in the subject position.
  • Whom is an object pronoun. It receives the action of the verb or is the object of a preposition. Think of it as the equivalent of "him," "her," or "them" in the object position.

The Simple Trick: Substitute 'He/She' or 'Him/Her'

The most effective way to determine whether to use "who" or "whom" is to mentally substitute the relevant pronoun in the sentence or clause.

  1. If "he" or "she" fits grammatically, use "who."
  2. If "him" or "her" fits grammatically, use "whom."

Let's break this down with examples.

Using 'Who'

"Who" is used when the pronoun is the subject of a verb.

Example 1:

> Who is coming to the party?

  • Substitution Test: Try replacing "who" with "he" or "she." "He is coming to the party." This makes sense. Therefore, "who" is correct.

Example 2:

> The student who aced the exam received a scholarship.

  • Breakdown: This sentence contains a relative clause: "who aced the exam." Within this clause, "who" is the subject performing the action "aced."
  • Substitution Test: "He aced the exam." This makes sense. So, "who" is correct.

Example 3:

> I need to know who will be leading the project.

  • Breakdown: The clause is "who will be leading the project." "Who" is the subject of "will be leading."
  • Substitution Test: "He will be leading the project." This makes sense. "Who" is correct.

Using 'Whom'

"Whom" is used when the pronoun is the object of a verb or a preposition.

Example 1:

> To whom should I address this letter?

  • Substitution Test: Try replacing "whom" with "him" or "her." "I should address this letter to him." This makes sense. Therefore, "whom" is correct. Notice that "whom" is the object of the preposition "to."

Example 2:

> The candidate whom the committee selected was highly qualified.

  • Breakdown: The relative clause is "whom the committee selected." In this clause, "whom" is the object of the verb "selected." The committee selected whom.
  • Substitution Test: "The committee selected him." This makes sense. Therefore, "whom" is correct.

Example 3:

> I'm not sure whom to ask for advice.

  • Breakdown: The clause is "whom to ask for advice." Here, "whom" is the object of the infinitive "to ask." You are asking whom.
  • Substitution Test: "I am not sure to ask him for advice." This makes sense. "Whom" is correct.

Common Pitfalls and How to Avoid Them

  1. Sentences with Multiple Clauses: When a sentence has multiple clauses, it can become confusing. Focus on the specific clause where you need to use "who" or "whom."

Sentence: The manager spoke to the employees who she believed were responsible. Focus: The clause "who she believed were responsible." Within this clause, who is the subject of "were responsible." "She believed they were responsible." So, "who" is correct.

  1. Questions Starting with "Who" or "Whom": This is where the substitution trick is most powerful.

Question: Who did you give the book to? Rephrase as a statement: You gave the book to him. (Object) -> So, the correct question is: To whom did you give the book?

Question: Whom is calling? Rephrase as a statement: He is calling. (Subject) -> So, the correct question is: Who is calling?

  1. Formal vs. Informal Usage: In very casual spoken English, the distinction between "who" and "whom" is often blurred, with "who" being used in both subject and object positions. However, in formal writing – academic papers, professional reports, official correspondence – using "whom" correctly is crucial for demonstrating a strong command of grammar.

When 'Whom' is Preceded by a Preposition

This is one of the clearest indicators that "whom" is the correct choice. If a preposition (like "to," "for," "with," "about," "from," "by," "of") directly precedes the pronoun, it's almost always "whom."

  • With whom are you going to the conference? (You are going with him.)
  • This is the person for whom I baked the cake. (I baked the cake for her.)
  • I don't know about whom they were speaking. (They were speaking about them.)

When 'Who' is the Subject of an Infinitive

This can be tricky. Consider the sentence: "I need to decide who to nominate."

  • Analysis: The infinitive is "to nominate." Who is the subject of this infinitive? You are deciding who will nominate.
  • Substitution: "I need to decide he to nominate." This doesn't sound right. Let's rephrase the infinitive clause as a full clause: "I need to decide who will nominate." Here, "who" is the subject.

The EssayMatrix Advantage

For students and professionals striving for impeccable grammar and sophisticated writing, tools and services can be invaluable. If you find yourself consistently struggling with grammatical nuances like "who" and "whom," or need to ensure your work is polished and professional, consider leveraging AI humanization and professional editing services. Platforms like EssayMatrix can help refine your writing, catch errors, and enhance clarity, ensuring your message is communicated effectively and accurately.

Practice Makes Perfect

The best way to solidify your understanding is through practice.

  • Identify: When you read, pay attention to how "who" and "whom" are used.
  • Write: Consciously try to use the substitution trick in your own writing.
  • Review: Proofread your work specifically for pronoun usage.

By consistently applying these rules and practicing, you'll soon find that distinguishing between "who" and "whom" becomes second nature, leading to more confident and correct communication.

Key Takeaways:

  • Who = Subject (like he/she)
  • Whom = Object (like him/her)
  • Trick: Substitute "he/she" (for who) or "him/her" (for whom).
  • Preposition + pronoun = usually "whom."

Mastering "who" and "whom" is a small but significant step towards polished, professional, and accurate writing.

Frequently Asked Questions

What's the easiest way to remember the difference between who and whom?

The simplest trick is to substitute "he/she" for "who" and "him/her" for "whom." If "he" or "she" fits, use "who." If "him" or "her" fits, use "whom."

When is 'whom' used in a sentence?

'Whom' is used when the pronoun acts as the object of a verb or the object of a preposition. It receives the action or follows a preposition like 'to', 'for', or 'with'.

Should I still worry about 'who' vs. 'whom' in casual writing?

In very informal spoken English, the distinction is often ignored, and 'who' is used for both. However, in formal writing like essays and professional documents, it's important to use 'whom' correctly.

Can you give an example of 'who' as a subject?

Certainly. In the sentence, "The artist **who** painted this masterpiece is brilliant," 'who' is the subject of the verb 'painted' within the relative clause. 'He' painted this masterpiece fits.

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