Many English learners get confused when they see words like who and whom. Both words refer to people, and both can appear in questions and sentences. Because they look similar, it is often hard to know which one is correct.
A very common question is whether we should say “who I worked with” or “whom I worked with.” You may have seen both forms in books, emails, job applications, and everyday conversations. This can make learners even more confused.
The good news is that the difference is not as difficult as it seems. Once you understand a few simple grammar rules, choosing the correct word becomes much easier.
Knowing the difference is important because it helps you write more clearly and speak more confidently. It is especially useful in formal writing, business communication, academic work, and professional conversations.
By the end of this guide, you will understand the meaning of who and whom, learn the grammar behind them, see many examples, discover common mistakes, and find an easy trick to remember which word to use.
What Does “Who” Mean?
Who is a pronoun used to talk about a person. It usually works as the subject of a sentence or clause.
The subject is the person who performs the action.
When to Use “Who”
Use who when the person is doing the action.
Think about these questions:
- Who called you?
- Who wrote this book?
- Who opened the door?
In each sentence, the person is performing the action.
Grammar Rule for “Who”
Use who when it acts as the subject.
Subject + Verb
Examples:
- Who called me yesterday?
- Who wants some coffee?
- Who is standing outside?
- She is the person who helped me.
- I know someone who speaks Spanish.
- Who sent this message?
- The teacher who taught us was kind.
- Who made this cake?
Common Learner Confusion
Many learners think who and whom can always replace each other. That is not true.
For example:
✅ The woman who called me is my aunt.
❌ The woman whom called me is my aunt.
Here, the woman performed the action of calling, so who is correct.
A simple question can help:
Who did the action?
If the answer is the person being discussed, who is often the correct choice.
What Does “Whom” Mean?
Whom is also a pronoun used for people. However, it usually works as the object of a verb or a preposition.
An object receives the action rather than performing it.
When to Use “Whom”
Use whom when the person receives the action.
Examples:
- Whom did you call?
- Whom should I contact?
- To whom should I send the email?
In these examples, the person is receiving the action.
Grammar Rule for “Whom”
Use whom when it functions as an object.
Verb → Object
Examples:
- Whom did you invite?
- Whom did they choose?
- Whom should we ask?
- To whom did you speak?
- With whom did you travel?
- Whom are you looking for?
- The person whom I met was friendly.
- Whom did she recommend?
Common Learner Confusion
Many English speakers do not use whom very often in daily conversation.
Because of this, people frequently say:
- Who did you invite?
- Who are you talking to?
These are common and acceptable in casual English.
However, in formal grammar, whom is traditionally considered correct because the person is the object.
This is why both forms may appear in real life.
Difference Between Who and Whom
The main difference is simple:
- Who = Subject
- Whom = Object
Comparison Table
| Feature | Who | Whom |
|---|---|---|
| Grammar Function | Subject | Object |
| Performs Action | Yes | No |
| Receives Action | No | Yes |
| Common in Speaking | Very common | Less common |
| Common in Formal Writing | Yes | Yes |
| Example | Who called you? | Whom did you call? |
Usage Difference
Look at these two sentences:
Who called Sarah?
The person performed the action of calling.
Whom did Sarah call?
The person received the action.
The meaning changes because the grammar role changes.
Sentence Structure Difference
With who:
- Who helped you?
- Who arrived first?
- Who broke the glass?
The person is doing something.
With whom:
- Whom did you help?
- Whom did they invite?
- Whom are you calling?
The person receives the action.
Meaning Comparison
Consider these examples:
Who loves Emma?
Someone loves Emma.
Whom does Emma love?
Emma loves someone.
The same people may be involved, but the grammar role changes completely.
Which Is Correct: “Who I Worked With” or “Whom I Worked With”?
From a traditional grammar point of view:
✅ The people whom I worked with
This is correct because the people are the object of the preposition with.
However, in modern English:
✅ The people who I worked with
This is extremely common and widely accepted, especially in conversation and informal writing.
Therefore:
- Formal grammar: whom I worked with
- Everyday English: who I worked with
Both are understood by native speakers.
Grammar Rules You Must Remember
Rule #1: Use “Who” for Subjects
If the person performs the action, use who.
Example:
- Who fixed the computer?
The person fixed it.
Rule #2: Use “Whom” for Objects
If the person receives the action, use whom.
Example:
- Whom did you hire?
The person received the action of hiring.
Rule #3: Use “Whom” After Prepositions in Formal English
Prepositions include:
- with
- to
- for
- from
- about
Examples:
- With whom did you work?
- To whom was the letter sent?
- For whom is this gift?
These are formal constructions.
Rule #4: Replace with “He” or “Him”
This is one of the easiest grammar tests.
If he fits, use who.
If him fits, use whom.
Example:
Who/Whom called you?
Answer:
He called me.
Therefore:
✅ Who called you?
Another example:
Who/Whom did you invite?
Answer:
I invited him.
Therefore:
✅ Whom did you invite?
Common Mistakes Students Make
Mistake 1: Using “Whom” as a Subject
Wrong:
❌ Whom wants to speak?
Correct:
✅ Who wants to speak?
Why?
The person is performing the action.
Mistake 2: Using “Who” in Very Formal Object Positions
Wrong (formal grammar):
❌ To who did you send the package?
Correct:
✅ To whom did you send the package?
The pronoun follows a preposition.
Mistake 3: Thinking “Whom” Is Always Better
Some learners believe that whom sounds smarter and should always be used.
Wrong:
❌ Whom wrote this report?
Correct:
✅ Who wrote this report?
Grammar matters more than sounding formal.
Mistake 4: Forgetting Spoken English Rules
Many students become worried when native speakers use who where grammar books say whom.
Example:
- Who are you talking to?
This is very common spoken English.
Do not be surprised when you hear it.
Easy Correction Tips
- Ask who is doing the action.
- Use the he/him test.
- Look for prepositions.
- Remember that spoken English often prefers who.
Easy Trick to Remember the Difference
A simple memory trick can save you a lot of time.
The He/Him Trick
Match:
- Who = He
- Whom = Him
Example:
Who/Whom completed the project?
Try replacing it:
He completed the project.
Therefore:
✅ Who completed the project?
Another example:
Who/Whom did you meet?
Try replacing it:
I met him.
Therefore:
✅ Whom did you meet?
Real-Life Logic
Imagine a football game.
The player kicking the ball is like who.
The player receiving the ball is like whom.
Action giver = who
Action receiver = whom
Many students find this easier to remember than long grammar explanations.
Daily Life Examples
These examples sound natural and appear in real conversations.
- She is the person who helped me find my apartment.
- The manager who hired me was very friendly.
- Who called me this morning?
- Who wants another cup of tea?
- Whom did you meet at the conference?
- The client whom we worked with was satisfied.
- Whom should I contact for support?
- Who is coming to the meeting tomorrow?
- The colleague who trained me was patient.
- The team whom we worked with completed the project on time.
Conversation Example 1
A: Who helped you finish the report?
B: My coworker helped me.
Conversation Example 2
A: Whom did you speak with yesterday?
B: I spoke with the sales manager.
Conversation Example 3
A: Who is your favorite teacher?
B: Mr. Ahmed is my favorite teacher.
Conversation Example 4
A: Who did you work with on the project?
B: I worked with Sarah and James.
Notice that native speakers often say:
Who did you work with?
instead of:
Whom did you work with?
Both are understood, but the first sounds more natural in everyday speech.
Practice Section
Choose the correct answer.
1. _____ called you last night?
A. Who
B. Whom
2. _____ did you invite to the party?
A. Who
B. Whom
3. The woman _____ helped me was kind.
A. Who
B. Whom
4. To _____ should I send this email?
A. Who
B. Whom
5. _____ wants to join the team?
A. Who
B. Whom
Answers
- A — Who
- B — Whom
- A — Who
- B — Whom
- A — Who
FAQs
What is the difference between who and whom?
Who is used as a subject, while whom is used as an object. A subject performs an action, and an object receives the action. This is the key difference between the two words.
Is “who I worked with” correct?
Yes. In modern English, who I worked with is very common and accepted in everyday conversation. Traditional grammar prefers whom I worked with, but many native speakers choose who.
Is “whom I worked with” grammatically correct?
Yes. It is grammatically correct because the pronoun is the object of the preposition with. This form is more common in formal writing.
Can we use who instead of whom?
In many informal situations, yes. Modern English often uses who where older grammar rules would require whom. However, formal writing may still prefer whom.
Is whom formal or informal?
Whom is generally considered more formal. It appears more often in academic writing, professional documents, and formal speeches than in casual conversation.
How can I quickly know whether to use who or whom?
Use the he/him test. If he fits the sentence, choose who. If him fits, choose whom. This method works in most situations.
Final Conclusion
The difference between who and whom becomes much easier once you understand the idea of subject and object.
A person who performs an action is usually connected with who, while a person who receives an action is usually connected with whom.
When deciding between who I worked with and whom I worked with, traditional grammar prefers whom because the pronoun is the object of the preposition with.
However, modern English speakers often use who, especially in conversation and informal writing.
Do not worry if this topic feels difficult at first. Even many native speakers hesitate when choosing between these two words.
The more examples you read and the more sentences you practice, the more natural the choice will become.
Keep using the he/him trick, pay attention to real-life English, and practice regularly. With time, choosing between who and whom will feel easy and automatic.
I am Benjamin Clark, an English language writer passionate about simplifying grammar, vocabulary, and word meanings. I create clear, accurate, and practical content to help learners improve their English skills with confidence every day.
