Pronoun case is about form—subject (I, he, she, we, they) vs object (me, him, her, us, them)—and the ACT loves testing who/whom and compound subjects like "Sarah and I" vs "Sarah and me." Agreement (singular/plural) is a separate skill; case is about role in the sentence.
Subject vs object
- Subject: She and I took the test.
- Object: The proctor called her and me.
Strip the partner noun to hear the right form: "Me took" is wrong, so "Sarah and me took" is wrong. Covered alongside pronoun agreement in ACT grammar rules.
Who vs whom
Who acts as subject; whom as object. Trick: answer with he/him. "To whom did you give it?" → "I gave it to him" → whom. "Who called?" → "He called" → who.
After than / as
Comparisons may drop verbs: "She runs faster than I (do)." The ACT often tests whether the pronoun is subject or object of the implied verb.
Who vs whom in idioms
Some fixed phrases use whom after prepositions (for whom, to whom). Pair with ACT idioms for prep patterns.
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