Pronoun Case: Who vs Whom on the Digital SAT

Quick Answer: Use 'who' when referring to the subject of a sentence or clause, and 'whom' when referring to the object. A quick trick is to substitute 'he' for 'who' and 'him' for 'whom' to see which sounds correct.

graph TD
    A[Identify the Pronoun's Clause] --> B{Does it perform an action?}
    B -->|Yes - It is the Subject| C[Use WHO]
    B -->|No - It receives the action| D{Is it the object of a verb or preposition?}
    D -->|Yes| E[Use WHOM]

What Is Pronoun Case: Who vs Whom?

In English grammar, pronouns change form depending on their role in a sentence—a concept known as "case." The subjective case is used when the pronoun is performing the action (the subject), while the objective case is used when the pronoun is receiving the action (the object).

On the Digital SAT, the College Board tests your ability to navigate Standard English Conventions. Just as you need to know /sat/reading-writing/comma-rules-sat to structure a sentence properly, you need to know when to use the subjective "who" versus the objective "whom." "Who" is the subject pronoun (like I, he, she, they), and "whom" is the object pronoun (like me, him, her, them).

While this might seem like a minor detail, the 2026 Digital SAT format frequently embeds these pronouns within complex, multi-clause sentences. If you aren't actively breaking the sentence down into its component clauses, it is easy to pick the wrong pronoun. For extra foundational practice, Khan Academy SAT offers great grammar drills.

Step-by-Step Method

1. Step 1 — Isolate the clause containing the pronoun. Ignore the rest of the sentence for a moment.
2. Step 2 — Identify the verb in that specific clause.
3. Step 3 — Ask yourself: Is the pronoun performing the action of this verb, or is it receiving the action/following a preposition?
4. Step 4 — Apply the "he/him" or "they/them" substitution trick. If "he" works, use "who." If "him" works, use "whom."

Key Strategy

The most reliable technique for this question type on the Digital SAT is the He/Him Substitution Trick, combined with clause isolation.

For example, look at the sentence: "The manager, [who/whom] I believe is highly qualified, will lead the team." First, isolate the clause: "[who/whom] is highly qualified." (The phrase "I believe" is an interrupting thought). Next, substitute: Would you say "he is highly qualified" or "him is highly qualified"? Since "he" is correct, the right answer is who.

Worked Example

Question: The committee members debated fiercely over the new policy, but ultimately the chairperson, to _______ the final decision was entrusted, chose to delay the vote.

A) who B) whom C) whoever D) whomever

Solution:

1. Isolate the relevant clause: "to _______ the final decision was entrusted"
2. Notice the preposition "to" immediately preceding the blank. Prepositions must be followed by an object.
3. Rearrange the clause to test it: "the final decision was entrusted to [he/him]".
4. Since "him" is the correct object pronoun here, we need the objective case relative pronoun.
5. The objective case is whom.

Correct Answer: B) whom

Common Traps

1. Prepositional Phrase Interference — Our data shows that prepositional phrases between the subject and verb cause 35% of agreement errors on the SAT. Similarly, when a preposition appears right before or after a pronoun, students often lose track of the subject-object relationship. Always remember that prepositions (to, for, with, by) require the objective case ("whom").

2. Over-relying on "Sounding Smart" — Based on Lumist student data, Standard English Conventions questions have a low 19% error rate overall because they are rule-based. However, errors spike when students abandon the rules and choose "whom" simply because it sounds more formal or intellectual. Always prove your answer using the he/him substitution trick.

FAQ

How do I know whether to use who or whom?

Substitute 'he' or 'him' into the sentence. If 'he' works, use 'who' (subjective case). If 'him' works, use 'whom' (objective case).

Do I ever use 'who' after a preposition?

No, prepositions are always followed by the objective case. You should use 'whom' after prepositions like 'to', 'for', 'with', and 'about'.

What if the pronoun is both an object of a preposition and the subject of a new clause?

The role of the pronoun in its own immediate clause determines its case. If it acts as the subject of the new clause, use 'who', even if the whole clause functions as the object of a preposition.

How many Pronoun Case: Who vs Whom questions are on the SAT?

Standard English Conventions makes up approximately 26% of SAT Reading & Writing. On Lumist.ai, we have 15 practice questions specifically on this topic to help you prepare.

Similar to understanding /sat/reading-writing/colons-when-to-use or /sat/reading-writing/semicolons-when-to-use, mastering pronoun case is a reliable way to secure points on the grammar section.