Who is used for the subject of a sentence. Whom is used for the object of a verb or preposition. The simple test is this: replace the word with he or she for who, and replace it with him or her for whom.
🧠 Simple test: If the answer is he or she, use who. If the answer is him or her, use whom.
Who vs Whom in One Simple Rule
Use who when you are talking about the person doing something. Use whom when you are talking about the person who receives the action.
✅ Use Who for the Subject
Who works like he, she, or they.
- Who sent the email?
- Who wants coffee?
- Who is at the door?
✅ Use Whom for the Object
Whom works like him, her, or them.
- Whom did you call?
- Whom should we invite?
- To whom did you send it?
The He or Him Test
The fastest way to choose between who and whom is to answer the question in your head. Do not overthink the grammar terms. Just test the sentence with he or him.
Question: Whom did you call?
Answer: I called him.
✅ Because him fits, use whom.
Who vs Whom Examples
Real examples make the rule much easier. Notice how who points to the person doing the action, while whom points to the person receiving it.
| Sentence | Correct Word | Simple Test | Why It Works |
|---|---|---|---|
| Who made this cake? | Who | She made it. | The person is doing the action. |
| Whom did you meet? | Whom | I met her. | The person receives the action. |
| Who is ready? | Who | He is ready. | The person is the subject. |
| For whom is this gift? | Whom | The gift is for him. | The word follows a preposition. |
| Who can help us? | Who | They can help us. | The person performs the action. |
When to Use Who
Use who when the person is the subject. In plain English, the subject is the person who does the action or is being described.
- ✅ Who wrote this message?
- ✅ Who is your teacher?
- ✅ Who lives next door?
- ✅ Who wants to join us?
A good clue: if the answer starts with he, she, or they, the question probably needs who.
When to Use Whom
Use whom when the person is the object. That means the person receives the action, or the word comes after a preposition such as to, for, with, by, or from.
- ✅ Whom did you ask?
- ✅ Whom are they waiting for?
- ✅ With whom are you speaking?
- ✅ To whom should I send the form?
In everyday conversation, many people say who instead of whom, especially in questions like “Who did you call?” In formal writing, whom is still the more precise choice when the word is an object.
Common Mistakes With Who and Whom
The most common mistake is using whom just because it sounds more formal. Formal does not always mean correct. If the word is doing the action, who is the right choice.
❌ Wrong
- Whom is coming tonight?
- Whom made this decision?
- Whom wants the last slice?
✅ Right
- Who is coming tonight?
- Who made this decision?
- Who wants the last slice?
Another common mistake is using who after a preposition in formal writing. In relaxed speech, it may sound normal. In polished writing, whom is cleaner.
❌ Less Formal or Less Precise
- To who should I reply?
- With who did you speak?
- For who is this note?
✅ More Formal and Precise
- To whom should I reply?
- With whom did you speak?
- For whom is this note?
The Preposition Clue
Words like to, for, with, by, and from often point toward whom. Why? Because the person after the preposition is usually the object.
| Preposition | Formal Sentence | Natural Meaning |
|---|---|---|
| to | To whom did you send it? | You sent it to him or her. |
| for | For whom is this seat? | The seat is for him or her. |
| with | With whom are you working? | You are working with him or her. |
| from | From whom did this message come? | The message came from him or her. |
Who vs Whom in Everyday English
In casual speech, who is often used where traditional grammar would choose whom. That is why “Who did you call?” sounds natural to many speakers. The formal version is “Whom did you call?”
A Practical Writing Tip
Use who in casual writing when whom feels stiff. Use whom in formal writing when the grammar clearly calls for an object.
Simple Grammar Test for Who vs Whom
Use this short test when you are unsure. It works for most everyday sentences and keeps the rule easy.
- Find the part of the sentence with who or whom.
- Answer the question using he, she, him, or her.
- If he or she sounds right, choose who.
- If him or her sounds right, choose whom.
Try it: ___ should we thank?
Answer test: We should thank her.
✅ The correct sentence is: Whom should we thank?
Try it: ___ should thank the team?
Answer test: She should thank the team.
✅ The correct sentence is: Who should thank the team?
Who vs Whom With Relative Clauses
Who and whom also appear in the middle of sentences. The same rule still works. Ask whether the person is doing the action or receiving it.
- ✅ The woman who lives upstairs is a doctor.
- ✅ The man whom we met yesterday was kind.
- ✅ The student who won the prize smiled.
- ✅ The speaker whom they invited arrived early.
In “the woman who lives upstairs,” the woman is doing the action: she lives upstairs. In “the man whom we met,” the man receives the action: we met him.
Who vs Whom After Than or As
Sentences with than or as can feel tricky because part of the sentence may be hidden. A short missing-word test helps.
Use Who When a Verb Is Implied
✅ She is taller than who?
This is casual and short for: She is taller than who is? In careful writing, many people would reword it.
Use Whom When an Object Is Implied
✅ You trust Alex more than whom?
This means: You trust Alex more than you trust whom. The person is receiving the action.
For smooth writing, it is often better to rewrite these sentences: “Who is she taller than?” or “Whom do you trust less than Alex?”
Mini Practice: Choose Who or Whom
Try each sentence before reading the answer. The goal is not to memorize a rule. The goal is to hear the sentence clearly.
| Sentence | Answer | Reason |
|---|---|---|
| ___ is calling? | Who | He is calling. |
| ___ did you text? | Whom | You texted him. |
| ___ knows the answer? | Who | She knows the answer. |
| To ___ should this be addressed? | Whom | It should be addressed to her. |
| ___ helped you move? | Who | They helped you move. |
Frequently Asked Questions About Who and Whom
Is Whom Still Used?
Yes. Whom is still used in formal writing, edited articles, business communication, and careful grammar. In casual speech, many people use who instead.
Is “Who Did You Call?” Wrong?
In strict formal grammar, “Whom did you call?” is more precise because the answer is him or her. In everyday English, “Who did you call?” is very common and usually sounds more natural.
Can I Avoid Whom?
Often, yes. If whom sounds too formal for your sentence, you can usually rewrite it. For example, instead of “To whom did you speak?”, you can write “Who did you speak to?” in a more conversational style.
What Is the Easiest Way to Remember Who vs Whom?
Remember this pair: who = he and whom = him. Both whom and him end with m, which makes the object form easier to remember.
✅ Final memory trick: Who does the action. Whom receives the action. Test with he and him when you are unsure.
