Who vs Whom: Simple Rule with Examples

Introduction

Many English learners (and even native speakers!) find the difference between who and whom confusing. But here is the good news: the rule is actually very simple. Once you learn a quick trick, you will never mix them up again. In this post, we will break down the rule, show you plenty of examples, and give you practice exercises to build your confidence.

What Is Who vs Whom?

Both who and whom are question words and relative pronouns. The key difference is their grammatical function in a sentence.

• Who is used as a subject (the person doing the action).
• Whom is used as an object (the person receiving the action).

Think of it like the difference between he (subject) and him (object). If you can replace the word with he, use who. If you can replace it with him, use whom.

Rules

1. Rule 1: Use “who” when it is the subject of a verb.
   Example: Who called you? (He called me.)
2. Rule 2: Use “whom” when it is the object of a verb or preposition.
   Example: Whom did you call? (You called him.)
3. Rule 3: After a preposition, always use “whom.”
   Example: To whom should I send this letter?
4. Rule 4: In casual speech, “who” is often used instead of “whom,” but in formal writing, the distinction matters.

How to Use It

Follow these three simple steps to decide between who and whom:

1. Step 1: Find the verb in the sentence or clause.
2. Step 2: Ask yourself: Is the person doing the verb (subject) or receiving it (object)?
3. Step 3: Use the he/him trick: Replace the unknown word with he or him. If he fits, use who. If him fits, use whom.

Let us see this trick in action:

• Question: Who/Whom wrote this book?
  Trick: “He wrote this book” → Who wrote this book? ✅
• Question: Who/Whom did you meet?
  Trick: “You met him” → Whom did you meet? ✅

Examples in Sentences

Here are 10+ sentences with the grammar point bolded for clarity.

• Who is coming to the party? (He is coming.)
• Whom did you invite to the party? (I invited him.)
• The woman who lives next door is a doctor. (She lives next door.)
• The man whom I saw yesterday was your brother. (I saw him yesterday.)
• Who made this delicious cake? (She made it.)
• To whom should I address this letter? (I should address it to him.)
• I know the person who won the prize. (He won the prize.)
• She is the teacher whom all the students respect. (The students respect her.)
• Who wants to go first? (He wants to go first.)
• For whom is this gift? (This gift is for him.)
• He is the only one who understands me. (He understands me.)
• That is the colleague whom I trust the most. (I trust him the most.)

Common Mistakes

Below are four common errors with the correct versions.

• ❌ Whom called you last night?
  ✅ Who called you last night? (He called you.)
• ❌ The girl who I met is very friendly.
  ✅ The girl whom I met is very friendly. (I met her.)
• ❌ Who did you give the book to? (Informal, but in formal writing:)
  ✅ To whom did you give the book? (You gave it to him.)
• ❌ He is the person whom I think is the best.
  ✅ He is the person who I think is the best. (I think he is the best – subject of the clause “is the best.”)

Quick Summary

• Who = subject (like he, she, they).
• Whom = object (like him, her, them).
• Use the he/him trick to decide quickly.
• After a preposition (to, for, with), always use whom.
• In casual conversation, who is often used for both, but in exams and formal writing, the rule matters.

Practice Exercises

Fill in the blanks with who or whom. Answers are below.

1. ___ is your favorite singer?
2. ___ did you see at the park?
3. She is the artist ___ painted this mural.
4. The man ___ we hired is very experienced.
5. With ___ are you going to the concert?

Answers:

1. Who (He is my favorite singer.)
2. Whom (You saw him at the park.)
3. Who (She painted this mural.)
4. Whom (We hired him.)
5. Whom (You are going with him.)

Conclusion

Mastering the difference between who and whom does not have to be hard. Remember the simple he/him trick, and you will choose the correct word every time. Practice with the exercises above, and soon it will become second nature. Keep writing, and do not be afraid to double-check your sentences!

FAQ

1. Can I use “who” instead of “whom” in everyday speech?

Yes, in informal spoken English, who is very commonly used in place of whom. For example, “Who did you talk to?” is perfectly acceptable in casual conversation. However, in formal writing, such as academic essays or business letters, you should use whom when it is the object.

2. What is the easiest way to remember the difference?

The easiest way is the he/him trick. If you can answer the question with he (subject), use who. If you can answer with him (object), use whom. For example: “Who/whom did you call?” → “I called him.” → Use whom.

3. Is “whom” becoming obsolete?

Many linguists note that whom is used less frequently in modern English, especially in speech. However, it is still required in formal grammar contexts, such as standardized tests (IELTS, TOEFL), academic writing, and professional correspondence. Learning it will make your English more precise.

4. Do I always use “whom” after a preposition?

Yes, in formal grammar, you should always use whom after a preposition. For example: “With whom are you speaking?” not “With who are you speaking?” In casual speech, people often say “Who are you speaking with?” but the formal structure places the preposition before whom.