Identify Agreement Errors — Identify subject-verb agreement and pronoun consistency errors.

Why Agreement Matters on the TEAS

The concept of grammatical agreement — the principle that certain words in a sentence must match in number, person, or gender — is a foundational convention of standard written English. In everyday speech, agreement errors often go unnoticed, but they become significant in formal and professional writing. As a future nursing professional, you will write patient notes, care plans, and clinical documentation where clarity and correctness directly affect the quality of communication.

English retains only a handful of agreement markers — most visibly, the third-person singular "-s" on present-tense verbs ("she writes," "he works"). This simplicity means that when errors occur, they typically follow predictable patterns: a prepositional phrase tricks the writer into agreeing with the wrong noun, or an indefinite pronoun is mistakenly treated as plural. The TEAS tests your ability to spot exactly these patterns. The good news is that a small set of reliable strategies, applied consistently, will allow you to identify and correct agreement errors quickly and confidently.

The central question this lesson addresses is deceptively simple: How do you reliably detect when a subject and its verb, or a pronoun and its antecedent, fail to agree? The answer requires not merely memorizing rules but developing a systematic analytical framework that accounts for the complexity of real sentences — sentences with intervening phrases, compound subjects, indefinite pronouns, and shifting points of view.

Core Principles of Agreement

Agreement in English operates along two primary axes: subject-verb agreement and pronoun-antecedent agreement. Both require that paired grammatical elements correspond in number (singular or plural) and, where applicable, in person (first, second, or third) and gender. While native speakers intuitively apply these rules in simple sentences, errors proliferate when syntactic complexity increases — when prepositional phrases separate subjects from verbs, when compound subjects introduce ambiguity, or when indefinite pronouns obscure number. The following foundational principles constitute the analytical toolkit needed to identify agreement errors with precision.

Visual Explanation — Sentence Anatomy

The following diagram illustrates the structural relationship between subjects, verbs, and intervening elements in a sentence that commonly triggers agreement errors. Observe how the true subject may be separated from the verb by a prepositional phrase whose object has a different number, creating the proximity trap described in Principle 2.

As the diagram makes clear, the key analytical step is to mentally bracket or remove intervening phrases to expose the subject-verb core. In the sentence "The collection of rare artifacts was displayed," stripping away "of rare artifacts" leaves "The collection … was displayed," which is unambiguously correct. This technique — sometimes called the stripping method — is the single most reliable strategy for subject-verb agreement questions on standardized examinations.

How Agreement Works — Rules & Decision Logic

Subject-Verb Agreement Decision Framework

Rather than memorizing isolated rules, it is more efficient to internalize a decision sequence that can be applied to any sentence. The following framework systematizes the agreement analysis into discrete steps, each of which eliminates a category of potential errors.

1. Step 1 — Locate the verb. Identify the main verb or verb phrase in the clause. In complex sentences, each clause has its own subject-verb pair.
2. Step 2 — Ask "Who or what performs this action?" The answer is the grammatical subject. Cross out prepositional phrases, appositive phrases, and parenthetical expressions to expose it.
3. Step 3 — Determine subject number. Is the subject singular, plural, or a compound structure? Apply compound-subject rules ("and" → plural; "or/nor" → agree with nearer element).
4. Step 4 — Check special cases. Indefinite pronouns, collective nouns, titles, and expressions of quantity each have specific agreement behaviors.
5. Step 5 — Verify verb form. Confirm the verb matches the subject in number and person. In present tense, singular third-person subjects take "-s" on the verb ("she writes"); plural subjects do not ("they write").

Pronoun-Antecedent Agreement Decision Framework

Pronoun agreement errors fall into two broad categories: number mismatch and person shift. A number mismatch occurs when a singular antecedent is paired with a plural pronoun or vice versa (e.g., "Each student must submit their application" — "each" is singular, "their" is plural in traditional prescriptive grammar). A person shift occurs when a sentence begins in one grammatical person and switches to another without justification (e.g., "When a nurse enters the ward, you should check the patient chart" — shifting from third to second person). The TEAS tests prescriptive conventions, so candidates should apply traditional agreement rules unless an answer choice explicitly accommodates singular "they."

Detailed Breakdown — Common Agreement Error Types

Agreement errors on standardized tests conform to a relatively small number of recurring patterns. The following taxonomy categorizes the most frequently tested error types and provides diagnostic examples for each. Internalizing these categories allows you to scan answer choices efficiently and recognize error signatures almost on sight.

Worked Example — Multi-Step Error Identification

Consider the following sentence, which is representative of the complexity you will encounter on the TEAS: "The team of researchers who published their findings in a peer-reviewed journal have been nominated for an award, and each of the members are expected to attend the ceremony."

Tricky Cases & Common Misconceptions

Certain grammatical constructions consistently produce disagreement — both in student performance and, ironically, among grammarians themselves. The following table compares constructions that routinely appear on the TEAS and similar standardized assessments, highlighting where test-takers most frequently err and the reasoning behind the prescribed correct form.

Prescriptive vs. Evolving Standards

The agreement conventions tested on the TEAS represent the prescriptive baseline of Standard American English. It is useful to know, however, that some of these rules are actively debated in style guides and professional writing contexts. Understanding where the TEAS standard differs from emerging usage will help you choose the right answer with confidence.

For the TEAS specifically, adhere to prescriptive conventions unless the question wording or answer choices clearly signal otherwise. When in doubt, apply the most widely recognized standard rule — it will be the one the TEAS rewards.

Practice Problems

Lesson Summary