Subject-Verb Agreement Rules, Intervening Phrases, and Compound Subjects

Core Agreement Mechanics & Third-Person Variations

The foundational principle of English grammar governing subjects and verbs is simple: a verb must agree in person (first, second, third) and number (singular, plural) with its subject. In the present simple tense, this relationship presents a distinct morphological contrast that frequently challenges non-native English speakers. While English nouns typically add an -s or -es suffix to form their plural forms (one student vs. two students), third-person singular verbs in the present tense add an -s or -es suffix (the student walks vs. the students walk).

To master subject-verb agreement for the ACCUPLACER ESL Language Use test, you must identify the structural core of the sentence—the true subject—and ignore non-essential modifiers that create distance between the subject and its predicate.

Singular vs. Plural Verb Forms in Present and Past Tenses

Notice that in regular present tense verbs, only the third-person singular form carries the -s inflection. In the past tense, only the verb to be retains distinct singular (was) and plural (were) forms. All other standard verbs in the past simple tense retain a uniform shape regardless of subject number (the student worked / the students worked).

Incorrect: The results of the laboratory analysis confirms our hypothesis.
Correct:   The results of the laboratory analysis confirm our hypothesis.

In the incorrect sentence above, the writer allowed the singular noun analysis (the object of a preposition) to dictate the verb form. The actual subject is the plural noun results, which demands the plural verb confirm.

Intervening Phrases, Prepositional Traps, and Parenthetical Expressions

A useful agreement pattern places a modifier between the subject and the verb. These modifiers often contain nouns of the opposite grammatical number from the subject, creating an auditory illusion of error when read casually.

The Prepositional Phrase Rule

A noun inside a prepositional phrase does not control agreement for the larger subject noun phrase. When an of, with, or similar phrase modifies the subject, temporarily bracket that phrase to locate the head noun that controls the verb.

• Example: "The box [of heavy iron tools and rusted nails] is stored under the workbench."
  • Prepositional phrase: "of heavy iron tools and rusted nails"
  • True Subject: "box" (singular)
  • Correct Verb: "is" (singular)

Quasi-Conjunctions and Parenthetical Modifiers

Expressions such as along with, as well as, in addition to, together with, accompanied by, including, such as, and except for are prepositions or complex prepositional phrases, not coordinating conjunctions. They do not make a singular subject compound.

The "One of the [Plural Noun] Who/That" Rule

Pay close attention to relative clauses starting with who, which, or that following the phrase one of the:

1. Standard Pattern: In the phrase "one of the [plural noun] who/that...", the relative pronoun (who/that) refers back to the plural noun, requiring a plural verb.
   • Example: "Dr. Vance is one of those professors who inspire students." (Which professors inspire? Those professors inspire; she is one of them.)
2. The Exception Pattern: When preceded by the only, the relative pronoun refers to the singular one, requiring a singular verb.
   • Example: "Dr. Vance is the only one of those professors who inspires students." (Only one professor inspires.)

Compound Subjects, Disjunctive Connections, and Proximity Rules

When a sentence contains more than one subject noun phrase, agreement depends on the specific conjunction connecting the nouns.

Subjects Joined by 'And'

Two or more singular subjects connected by and almost always form a plural compound subject requiring a plural verb.

• Standard Compound: "The architect and the contractor have agreed on the revised timeline."
• Single Entity Exception: When the two nouns refer to a single combined idea, item, or person, the verb is singular.
  • Compound Concept: "Bacon and eggs is a classic breakfast menu item."
  • Single Person: "Our lead scientist and department chair is giving the keynote address." (One individual holds both titles.)

Disjunctive Subjects ('Or', 'Nor', 'Either...Or', 'Neither...Nor')

When subjects are connected by disjunctive conjunctions, they are not added together into a plural unit. Instead, the verb follows the Rule of Proximity: the verb agrees with whichever subject noun phrase is physically closest to the verb.

Formula 1: Singular Subject + OR/NOR + Plural Subject  => Plural Verb
Formula 2: Plural Subject   + OR/NOR + Singular Subject => Singular Verb

• Proximity to Plural: "Neither the department manager nor the team members were aware of the policy change."
• Proximity to Singular: "Neither the team members nor the department manager was aware of the policy change."
• Both Singular: "Either Julia or Mark is going to present the quarterly report."

Indefinite Pronouns, Collective Nouns, and Inverted Sentences

Subject-verb agreement challenges often involve specialized noun categories and inverted word order.

Categorizing Indefinite Pronouns

Indefinite pronouns refer to non-specific persons, places, or things. Their agreement rules fall into three distinct categories:

1. Always Singular (Requires Singular Verb):
   • each, every, everyone, everybody, everything, someone, somebody, something, anyone, anybody, anything, no one, nobody, nothing, either, neither, one.
   • Examples: "Everyone in the auditorium was quiet." / "Neither of the available options seems optimal."
   • Special Modifier Rule: Adding every or each before compound singular subjects connected by and makes the subject singular: "Every doctor and every nurse was re-certified."
2. Always Plural (Requires Plural Verb):
   • both, few, many, several.
   • Example: "Several of the applicants have advanced qualifications."
3. Variable Pronouns (The SANAM Rule):
   • Some, Any, None, All, Most (and More).
   • Agreement depends on the object of the preposition that follows the pronoun:
     • If the object is a non-count noun, use a singular verb: "All of the information is accurate."
     • If the object is a plural count noun, use a plural verb: "All of the documents are accurate."

Collective Nouns

Collective nouns (committee, team, faculty, audience, class, jury, family, group, government) refer to a group made up of individual members.

• Singular Unit (Standard): When the group acts as a single, unified body performing one action, use a singular verb.
  • Example: "The faculty has voted unanimously to adopt the new curriculum."
• Individual members: In American edited English, rewrite with a plural head noun when the members act separately.
  • Example: "The committee members are debating their individual perspectives." Some other English varieties allow plural agreement directly with a collective noun, so use the conventions and context supplied by the item.

Inverted Sentence Structures (Here / There / Locative Inversions)

In standard English declarative sentences, the subject precedes the verb. However, in sentences introduced by there, here, or prepositional phrases indicating location (locative inversion), the subject appears after the verb.

• Expletive 'There/Here':
  • "There is a major obstacle to our plan." (Subject: obstacle [singular] => verb: is)
  • "There are several major obstacles to our plan." (Subject: obstacles [plural] => verb: are)
• Locative Inversion:
  • "On top of the bookshelf rests an old dictionary." (Subject: dictionary [singular] => verb: rests)
  • "On top of the bookshelf rest several old dictionaries." (Subject: dictionaries [plural] => verb: rest)