When Do You Use “Whom” vs. “Who”? WATCH: How To Use "Who" vs. "Whom" Previous Next Over the last 200 years, the pronoun whom has been on a steady decline. Despite its waning use in speech and ongoing speculation about its imminent extinction, whom still holds a spot in the English language, particularly in formal writing. Understanding when and how to use this pronoun can set your writing apart. If whom is on the decline, then who must be growing in popularity. The two—as you’ll recall from English class—are related and may seem interchangeable. But are they really? What’s the difference between whom and who? Whom is often confused with who. Who is a subjective-case pronoun, meaning it functions as a subject in a sentence, and whom is an objective-case pronoun, meaning it functions as an object in a sentence. Who, like I, he, she, we, and they, performs actions: Who rescued the dog? I’m not sure who called my name. Do you know who baked this cake? Who is doing the rescuing in the first sentence. Similarly, who called and who baked in the other examples. Whom, like me, him, her, us, and them, is acted on: Whom did you see? His grandchildren, whom he loves so much, are in town for a visit. The cook, whom she just hired, failed to show up to work today. In the first sentence, whom is being seen here, not doing the seeing. In the other examples, whom is being loved and hired. Whom more commonly appears when it follows a preposition, as in the salutation “To whom it may concern.” Does it concern he? No. Does it concern him? Yes. How do you decide to use who or whom? When in doubt, substitute him (sometimes you’ll have to rephrase the sentence) and see if that sounds right. If him is OK, then whom is OK. If the more natural substitute is he, then go with who. For example: You talked to who/whom? It would be incorrect to say, “You talked to he?”, but saying, “You talked to him?” makes grammatical sense. So you would ask, “You talked to whom?” All of that said, in informal speech and writing, speakers will often opt for who where whom has traditionally been used. This choice sounds more natural and less formal to most native English speakers. For those whom grammar is a tad bewildering, we’re here to help, whether it’s learning the correct use of semicolons or commas, or finally understanding the difference between then and than!