Identify Correct Grammar

The study of grammar—defined as the systematic rules governing the structure of a language—has deep roots stretching back to antiquity. Understanding how prescriptive grammar evolved helps us appreciate why standardized conventions matter in professional and academic contexts today. For aspiring graduate students preparing for the Test of Essential Academic Skills (TEAS), identifying correct grammar is not merely about rote memorization—it reflects the ability to communicate with precision, clarity, and authority in healthcare and scientific fields.

The central question the TEAS grammar section addresses is straightforward yet demanding: given a sentence or passage, can you reliably distinguish grammatically correct constructions from incorrect ones? This competency requires fluency with subject-verb agreement, pronoun-antecedent agreement, verb tense consistency, sentence structure, and several other conventions that collectively define Standard Written English.

Identifying correct grammar on the TEAS requires mastery of a finite set of core principles. These principles govern how words relate to one another within sentences and how sentences combine to form coherent discourse. While the English language is notoriously complex, the exam tests a well-defined subset of conventions that can be organized into five foundational categories. Each category addresses a different dimension of grammatical correctness, from word-level agreement to clause-level logic.

The following diagram illustrates how a grammatically correct sentence is constructed from its constituent parts. By visualizing the hierarchical relationship between subjects, verbs, objects, and modifiers, you can develop a systematic approach to identifying grammatical errors on the TEAS. Each layer of the diagram represents a level of syntactic analysis—from the broadest classification (independent clause vs. dependent clause) down to individual word functions.

When approaching a TEAS grammar question, mentally reconstruct this tree. First, identify the subject and the main verb to confirm they agree. Next, check that any pronouns clearly refer to a specific antecedent. Then, verify that modifiers are positioned adjacent to the words they modify. Finally, confirm that the sentence constitutes a complete independent clause—or, if it contains multiple clauses, that they are properly joined with a coordinating conjunction, subordinating conjunction, or semicolon. This systematic approach transforms grammar identification from guesswork into a reliable analytical process.

Subject-Verb Agreement: The Core Mechanism

Subject-verb agreement is arguably the most frequently tested grammar convention on the TEAS. The rule itself is deceptively simple: a singular subject takes a singular verb, and a plural subject takes a plural verb. However, the difficulty arises from intervening phrases, inverted sentence order, compound subjects, and indefinite pronouns that obscure the true subject. Consider the sentence: "The collection of patient records were missing." The subject is "collection" (singular), not "records" (plural), so the correct verb is "was," not "were." The prepositional phrase "of patient records" is merely a modifier that does not change the number of the subject.

Pronoun-Antecedent Agreement & Reference Clarity

Pronoun errors on the TEAS typically fall into two categories: agreement errors and ambiguous reference. An agreement error occurs when a pronoun does not match its antecedent in number—for example, "Each student must submit their assignment" uses a plural pronoun ("their") to refer to a singular antecedent ("Each student"). While this usage is increasingly accepted in informal contexts, the TEAS adheres to traditional prescriptive standards where "his or her" or a restructured sentence is preferred. Ambiguous reference occurs when a pronoun could logically refer to more than one noun, as in "When the nurse informed the physician, she was surprised"—it is unclear whether "she" refers to the nurse or the physician.

Sentence Structure Errors: Fragments, Run-ons, & Comma Splices

A sentence fragment lacks either a subject, a predicate, or both, or it is a dependent clause masquerading as a complete sentence (e.g., "Because the medication was administered late."). A run-on sentence fuses two independent clauses without any punctuation or conjunction (e.g., "The patient improved he was discharged."). A comma splice uses only a comma—without a coordinating conjunction—to join two independent clauses (e.g., "The lab results arrived, the doctor reviewed them."). Correcting a comma splice requires one of four strategies: (1) add a coordinating conjunction after the comma, (2) replace the comma with a semicolon, (3) replace the comma with a period and begin a new sentence, or (4) subordinate one of the clauses.

The TEAS English and Language Usage section draws from a predictable taxonomy of grammatical errors. The following diagram organizes these errors into a decision-tree format, illustrating the diagnostic process you should employ when evaluating each answer choice. By categorizing errors systematically, you can efficiently eliminate incorrect options and identify the grammatically correct sentence.

The following worked example models the analytical process you should apply to a typical TEAS grammar question. The question asks you to identify which of four sentences is grammatically correct.

Even students with strong grammatical intuition can be tripped up by TEAS questions that exploit common cognitive biases. The exam designers craft distractor answer choices that "sound right" by leveraging colloquial speech patterns, intervening noise between subjects and verbs, and the inherent ambiguity of English syntax. Understanding these pitfalls—and having explicit strategies to counter them—can significantly improve your accuracy and speed on test day.

The grammar skills tested on the TEAS are not merely exam-specific hurdles; they form the foundation of the precise, unambiguous writing expected in graduate programs and healthcare professions. Patient care documentation, research manuscripts, policy briefs, and clinical correspondence all demand grammatical rigor because ambiguity in these contexts can have serious consequences. A misplaced modifier in a medication order or an ambiguous pronoun reference in a clinical note can lead to genuine patient safety risks.

As you advance into graduate study, you will encounter additional layers of grammatical sophistication—including the strategic use of the subjunctive mood in research hypotheses ("If the intervention were to prove effective..."), the distinction between restrictive and nonrestrictive clauses ("that" vs. "which"), and nuanced uses of the passive voice in scientific writing. Mastering the fundamentals tested on the TEAS gives you the scaffolding to build these higher-order competencies with confidence.