"Whom" is a pronoun, specifically an objective-case interrogative pronoun used to ask about the recipient or object of a verb or preposition. It appears in formal and written English, especially in questions involving prepositions or direct objects.
Unlike "who," which functions as a subject pronoun, "whom" serves as the object. It is most often used after prepositions such as "to," "for," "with," or "about." For example: "To whom did you send the letter?" Here, "whom" is the object of the preposition "to."
While "whom" is grammatically correct in formal contexts, many native speakers replace it with "who" in spoken English due to declining usage. However, in formal writing, legal documents, academic work, and standardized tests, "whom" remains necessary for precision.
Whom acts as the object of a verb or preposition. To determine whether to use "who" or "whom," substitute "he" or "him" into the sentence. If "him" fits, use "whom."
For example: "Whom did you invite?" Replace "whom" with "him": "Did you invite him?" This confirms "whom" is correct. If you substitute "he" and it sounds right, then "who" is appropriate.
Another example: "To whom should I address this email?" Replace "whom" with "him": "To him should I address this email?" While awkward in speech, the substitution confirms "whom" is correct. Using "who" here would be ungrammatical in formal writing.
Whom is a singular, gender-neutral pronoun used exclusively in formal or written English. It does not have plural forms - the plural form of "who" and "whom" is "whom" in plural constructions, though "whom" is rarely used in plural contexts.
Examples of "whom" in different structures:
Modern usage often replaces "whom" with "who" in informal speech and writing. But in formal contexts, retaining "whom" maintains grammatical accuracy and clarity.
A frequent error is using "who" instead of "whom" in formal writing. For example: "Who did you give the book to?" is incorrect in formal grammar. The correct version is: "To whom did you give the book?"
Another misconception is that "whom" is obsolete. While it's rare in casual conversation, it remains essential in formal writing. According to the Grammarly Blog, "whom" is still taught in schools and expected in formal assessments.
Even in published literature, "whom" appears in authoritative texts. The Merriam-Webster Dictionary defines "whom" as "used as the object of a verb or preposition" and includes numerous examples from 19th-century novels and modern legal documents.
Consider this sentence from a contract: "The agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns." Here, "to whom" would be used if the clause were phrased as a question: "To whom does this provision apply?"
In academic writing, a student might write: "The study focused on participants whom the researchers had previously contacted." Replacing "whom" with "who" would change the meaning: "participants who the researchers had contacted" implies the participants were the ones doing the contacting, which is incorrect.
This example shows that using "whom" correctly preserves meaning and avoids ambiguity in complex sentences.
The difference between "who" and "whom" hinges on grammatical role. "Who" is subjective; "whom" is objective. Use this table to clarify:
| Use Case | Correct Pronoun | Example |
|---|---|---|
| Subject of a clause | Who | Who called you? |
| Object of a verb | Whom | Whom did you call? |
| Object of a preposition | Whom | To whom did you speak? |
| Relative clause (object) | Whom | The woman whom you met is my sister. |
When in doubt, apply the "he/him" test. If "he" fits, use "who." If "him" fits, use "whom."
I once reviewed a graduate thesis where the author wrote: "The researcher interviewed individuals who were affected by policy changes." Replacing "who" with "whom" changed the meaning: "individuals whom were affected" is ungrammatical because "whom" cannot be the subject of a verb. The original sentence was correct because "who" referred to the subject of the clause.
However, in the sentence: "The researcher interviewed individuals whom the committee had selected," "whom" is correct because it is the object of the verb "selected."
Understanding "whom" helps clarify other pronouns. For instance, "is mine a possessive pronoun?" - yes, "mine" is a possessive pronoun used without a noun. Similarly, "is their a possessive pronoun?" - no, "their" is a possessive adjective, not a pronoun. "Their" modifies a noun; "theirs" is the possessive pronoun.
For example: "This book is mine" uses "mine" as a pronoun. "This book is theirs" uses "theirs" as a pronoun. "Their" would appear in: "Their book is on the table."
When writing formally, ensure you're using the correct form. Misusing "their" as a pronoun leads to errors like: "The team completed their task" - acceptable in informal English, but "their" is still an adjective, not a pronoun.
Knowing that "whom" is a valid pronoun reinforces proper grammar in formal writing. It is not archaic - it remains a functional part of English syntax, especially in structured or professional contexts.
Final clarification: "Is whom a pronoun?" Yes. It is a formal, objective-case interrogative pronoun used when asking about the recipient of an action or the object of a preposition. Its correct use enhances precision in writing and speaking.