Recognize and correct pronoun agreement and pronoun case errors

Historical Context & Motivation

The English pronoun system descends from Old English, a language that inflected nouns, adjectives, and pronouns across five grammatical cases, three genders, and two numbers. As the broader inflectional system eroded through the Middle English period—largely under the phonological and syntactic pressures of Norman French contact—pronouns retained more of their case distinctions than any other part of speech. This survival makes pronouns a uniquely rich site of grammatical error in Modern English, because speakers must still navigate remnants of a system that has otherwise disappeared. For graduate-level test-takers, understanding why these distinctions persist clarifies why pronoun agreement and pronoun case remain among the most heavily tested grammar concepts on standardized exams, including the HESI A2.

The central question this lesson addresses is both practical and analytical: given a sentence on the HESI A2, how does one systematically identify whether a pronoun agrees with its antecedent and whether it appears in the correct case? Answering that question requires a firm grasp of two distinct but overlapping grammatical subsystems—agreement (matching number, gender, and person) and case (matching syntactic function)—which we will now examine in turn.

Core Principles & Definitions

Before dissecting errors, one must internalize the foundational terms. A pronoun replaces or refers back to a noun or noun phrase called its antecedent. Pronoun agreement requires that the pronoun match its antecedent in number (singular vs. plural), person (first, second, third), and, for third-person singular, gender. Pronoun case requires that the pronoun's form reflect its syntactic role: subjects take the subjective (nominative) case, objects take the objective (accusative) case, and possessors take the possessive (genitive) case.

Visual Explanation: Pronoun Case Map

The diagram above provides a portable heuristic for case selection that you can mentally rehearse during the exam. Notice that the decision tree maps neatly onto three syntactic roles: subject, object, and possessor. The most error-prone contexts—compound subjects, predicate nominatives after linking verbs, and objects of prepositions—all resolve cleanly once you have identified the correct branch. In clinical documentation, for instance, the sentence 'The physician and her reviewed the labs' is immediately correctable: 'her' is in the objective case but occupies a subject position, so the subjective 'she' is required.

How Pronoun Agreement Works

Agreement in Number

The most heavily tested agreement rule on the HESI A2 involves indefinite pronouns. Words such as everyone, everybody, each, either, neither, anyone, anybody, no one, nobody are grammatically singular despite their semantic suggestion of plurality. Therefore, a pronoun referring back to one of these antecedents must also be singular: 'Each of the nurses must complete his or her continuing education,' not 'their continuing education' in strictly formal, prescriptive usage. Conversely, antecedents such as both, few, many, several are always plural and require plural pronouns. A third category—some, any, none, all, most—takes its number from the noun in the prepositional phrase that follows it: 'All of the medication has lost its potency' (singular 'medication') versus 'All of the patients have received their discharge papers' (plural 'patients').

Agreement in Person

Person-shift errors arise when a sentence begins in one grammatical person and switches to another mid-clause. A classic HESI A2 trap is the sentence 'When a student studies for the exam, you should take breaks every hour.' The antecedent 'a student' is third person, but the pronoun 'you' is second person. The corrected version uses a third-person pronoun: 'he or she should take breaks' (or, in formal revision, 'the student should take breaks'). Maintaining consistent person throughout a sentence is as important as maintaining consistent number, and the HESI A2 routinely embeds these errors in otherwise complex sentences to test your attention.

Case Selection in Detail

Beyond the decision tree presented in Section 3, several specific constructions warrant deeper analysis. After a linking verb (be, seem, become, appear), a pronoun that renames the subject is called a predicate nominative and takes the subjective case: 'The charge nurse today is she,' not 'her.' In comparisons using 'than' or 'as,' the pronoun's case depends on whether it functions as a subject or an object of the implied clause: 'She is more experienced than he [is]' versus 'The patient trusts you more than [the patient trusts] me.' Finally, appositives must match the case of the noun they rename: 'The two finalists—Sarah and I—will present at the conference' (subjective, because 'finalists' is the subject).

Pronoun Case Forms: A Complete Reference

The table below catalogues every personal pronoun and the relative/interrogative pronouns who/whom/whose across all three cases. Internalizing this grid is essential because the HESI A2 does not test pronouns in isolation; it embeds them in syntactically complex sentences where the correct form must be retrieved automatically. Reviewing the grid will also help you notice the asymmetry in English: 'you' and 'it' do not change between subjective and objective case, which means they can never produce a case error—only an agreement error.

Worked Example: HESI A2–Style Sentence Correction

Consider the following HESI A2–style question: "Neither the attending physician nor the residents remembered to submit their timesheet on Friday." Identify and correct any pronoun errors.

Common Pitfalls vs. Correct Usage

The HESI A2 grammar section consistently exploits certain high-frequency error types because they reflect genuine points of confusion among educated writers. The table below juxtaposes these pitfalls with the rules that resolve them. Understanding not just what the correct answer is but why the error occurs will improve both your test score and your clinical writing.

Connection to Advanced & Clinical Writing

While the HESI A2 tests pronoun mechanics at the sentence level, the same principles scale directly into the extended writing tasks you will encounter in graduate coursework, research documentation, and clinical practice. In evidence-based practice reports, for instance, a pronoun with an ambiguous antecedent can obscure whether a finding pertains to the experimental group or the control group—a confusion with real consequences for patient care decisions. Similarly, in SOAP notes, a pronoun case error such as 'The patient stated that them and their spouse have been non-compliant' not only violates Standard English but also projects a lack of professional precision. Mastering these mechanics at the HESI A2 level, therefore, is not merely an academic exercise; it is preparation for the communicative rigor that healthcare settings demand.

Looking ahead, as you transition from standardized test preparation to clinical and academic writing, the prescriptive rules you learn here will serve as your baseline. You will layer onto that baseline the evolving conventions of professional style guides—particularly the APA 7th edition's endorsement of singular 'they' for nonbinary individuals and for generic references when the antecedent's gender is unknown. Understanding the prescriptive rule first ensures that any departure from it is deliberate and informed, rather than inadvertent.

Practice Problems

Lesson Summary