The who-whom distinction depends on grammatical role, not on how formal a sentence sounds. Who is a subject form, while whom is an object form. The same contrast appears in he and him or they and them.
Modern conversational English often uses who where formal grammar allows whom, especially at the beginning of questions. Understanding the structure helps you choose intentionally for the context rather than adding whom simply to sound polished.
Editorial note: Every message and example in this guide is original and designed as a starting point. Personalize names, memories, outcomes, and tone before sending.
THE SHORT ANSWER
How to get the wording right
Use who as the subject performing an action: “Who called?” Use whom as an object receiving the action or following a preposition: “Whom did you call?” Test with he/him or they/them. If he or they fits, use who; if him or them fits, use whom.
A SIMPLE METHOD
How to write a message that sounds sincere
Who performs the action
Use who when the pronoun is the subject of its verb inside the relevant clause.
Whom receives the action
Use whom when the pronoun is the object of a verb or preposition.
Use the he-him test
Reframe the clause as a statement. He or they points to who; him or them points to whom.
Analyze the inner clause
In phrases such as “who do you think will win,” who is the subject of will win, even though other words interrupt the clause.
NEED A FRESH DIRECTION?
Turn your idea into original wording
Use the AIQuotes Pro quote generator to explore different tones and lengths. Treat the result as a first draft, then add a detail only you know.
Create a quote freeExamples using who
Who acts as the subject of the verb.
Who approved the final version?
Do you know who is leading the workshop?
The designer who created the system will present it.
Who do you think will arrive first?
We need someone who understands the customer journey.
Examples using whom
Whom receives the action or follows a preposition.
Whom did the committee select?
The candidate whom we interviewed accepted the offer.
To whom should I address the letter?
She thanked everyone with whom she had worked.
Whom are you inviting to the review meeting?
Using the he-him test
Turn the question into an answer and compare pronoun forms.
Who called? He called—so use who.
Whom did you call? You called him—so use whom.
Who will lead? They will lead—so use who.
With whom did you speak? You spoke with them—so use whom.
Who do you believe wrote it? You believe she wrote it—so use who.
Formal and conversational choices
Modern usage may prefer natural who even when formal grammar permits whom.
Formal: Whom should I contact? Conversational: Who should I contact?
Formal: To whom are you writing? Conversational: Who are you writing to?
Formal: The person with whom I spoke. Conversational: The person who I spoke with.
Keep whom after a fronted preposition in formal prose: for whom, by whom, with whom.
Do not use whom as a subject merely because the sentence sounds formal.
WHAT TO AVOID
Common mistakes that weaken the message
Choosing by formality
Whom is not a more elegant version of who. It is correct only when the pronoun functions as an object.
Testing the wrong clause
Ignore phrases such as do you think and identify the role of who or whom in the clause that contains its verb.
Forcing unnatural wording
In informal contexts, standard conversational who may communicate more naturally. Use whom where clarity, convention, or formal style supports it.
FINAL CHECK
Make the final version yours
When uncertain, rewrite the relevant clause with he/him or they/them. This reveals grammatical role more reliably than relying on whether whom sounds impressive.
The distinction is most visible after a preposition and in formal prose. Elsewhere, understand the rule, consider the audience, and choose the form that is both grammatical and natural for the context.
QUESTIONS, ANSWERED
Frequently asked questions
What is the difference between who and whom?+
Who is a subject pronoun, like he or they. Whom is an object pronoun, like him or them.
Is it who did you call or whom did you call?+
Formally, “Whom did you call?” is correct because the pronoun is the object of call. “Who did you call?” is extremely common in conversational English.
How does the he-him test work?+
Turn the clause into an answer. If he or they fits, use who. If him or them fits, use whom. “You invited them” points to “Whom did you invite?”
Can I always use who instead of whom?+
Who is widely accepted in informal speech where traditional grammar uses whom. In formal writing, especially after a fronted preposition, whom remains the expected form.