Who vs. Whom

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Choosing between “who” and “whom” can be confusing for even experienced writers. This article will outline when to use who, when to use whom, and how to remember the difference easily.
You could call who and whom grammatical cousins. We use these as interrogative pronouns to ask about what or which person or people in a question. We can also use them as relative pronouns to connect two phrases or clauses about a person or people to one another.
The difference is who is the pronoun for the subject of a sentence, while whom is the pronoun for the object. Therefore, you only need to figure out if you want to select the pronoun for the sentence’s subject or the object.
To understand when to use who and whom, let’s review the basics of subjects and objects.
In a sentence, the subject is the person or thing doing the action or being described.
The object is the person or thing that receives the action in a sentence.
Pronouns allow us to refer to subjects and objects in the sentences without using the noun’s full name. We use pronouns all the time, and usually, it’s only these two tricky ones, who and whom, that cause trouble. You may recall from long-ago grammar lessons that there are different pronouns for subjects and objects.
We can replace the example sentences with pronouns.
If we transform these sentences into questions, we use the interrogative pronouns: who and whom. Let’s revise the previous example to inquire about the subject of the sentence:
Now, let’s inquire about the object of the sentence:
Strict grammarians shudder at a sentence ending in a preposition, but a rigid adherence to this rule can make your tone sound pretentious or prissy.
As a question, we can use who as an interrogative pronoun:
As a connector, we can use who as a relative pronoun for people:
As a question, we can use whom as an interrogative pronoun:
As a connector, we can use who as a relative pronoun for people:
The easiest way to remember the difference is to replace who or whom with another pronoun. It might take some re-wording, but it will help you check if it’s a subject or object, and to choose the right pronoun between who and whom.
For example, let’s replace who with either a subjective pronoun (they) or an objective pronoun (them) in the example: Who is heading to the conference next month?
It’s clear that option A is the sensical sentence with the subjective pronoun. This check confirms that who, also a subjective pronoun, is the correct word to use.
As another example, let’s replace whom with either a subjective pronoun (he) or an objective pronoun (him) in the example: Can you tell me to whom you emailed the results?
In this case, B is the correct sentence. Employing the objective noun ‘him’ in the response sentence means that the question form needs to be the objective form whom.
Navigating and selecting the correct pronouns is critical in business writing. Paying attention to grammatical details reflects your overall business’ attention to detail. It ensures that your words support, not distract from, your content.