The core principle of subject-verb agreement is one of the first and most fundamental rules of English grammar. The concept is simple: a singular subject takes a singular verb, and a plural subject takes a plural verb. “The dog barks” (singular), and “The dogs bark” (plural). This seems straightforward, yet this single rule is the source of more grammatical errors in professional and academic writing than almost any other. The problem is rarely that a writer doesn’t know the rule; the problem is that it can be surprisingly difficult to identify the true subject of the sentence.
The key to mastering subject-verb agreement is not to memorize endless rules, but to learn to be a grammar detective. It is about learning to ask a specific set of questions to uncover the real subject that the verb must agree with. This article explores the most common related questions and traps that writers face.
The First Question: “What is the real subject of this sentence?”
The most common error occurs when the subject and verb are separated by a long string of words, particularly a prepositional phrase. These phrases act as camouflage, confusing the writer as to which noun the verb should agree with.
The trap is the prepositional phrase. A prepositional phrase begins with a word like of, in, at, with, to, for, between, among, on, by, etc. The subject of a sentence is never inside one of these phrases.
- Incorrect: The box of assorted chocolates are on the shelf.
- Correct: The box of assorted chocolates is on the shelf.
The Question to Ask: What is actually on the shelf? Is it the chocolates? No, it is the box. The phrase “of assorted chocolates” simply describes the box. The true subject is “box” (singular), so the verb must be “is” (singular). By mentally crossing out the prepositional phrase, you can easily identify the real subject.
A similar problem occurs with sentences that begin with “There is” or “There are.” In these sentences, the subject actually comes after the verb.
- Incorrect: There is three main reasons for this decision.
- Correct: There are three main reasons for this decision.
The Question to Ask: What exists? “Three main reasons” (plural). Therefore, the verb must be “are.”
The Second Question: “Is this tricky subject singular or plural?”
Sometimes, the subject is not hidden, but its status as singular or plural is ambiguous. These “tricky subjects” are the second most common source of error.
The Trap: Indefinite Pronouns Words like each, every, everyone, everybody, anyone, anybody, no one, nobody, someone, and somebody feel plural, but they are grammatically singular.
- Incorrect: Everyone on the team are happy with the result.
- Correct: Everyone on the team is happy with the result.
The Question to Ask: Does the pronoun end in “one” or “body”? If so, treat it as a single unit. “Each” of the players also takes a singular verb (“Each is…”).
The Trap: Collective Nouns Words like team, family, committee, group, staff, and audience are also tricky. They represent a group of multiple people, but the word itself is singular.
- Correct: The committee is meeting today.
- Correct: The staff takes a break at 10:00 AM.
In these cases, the group is acting as a single, unified entity. While there are some exceptions (for example, in British English or when the members of the group are acting as individuals), the standard rule is to treat the collective noun as singular.
The Third Question: “How is the subject joined?”
When a sentence has two subjects joined by a conjunction, the conjunction itself determines the verb form.
Joined by “and”: Two subjects joined by “and” almost always create a plural subject.
- Correct: The manager and the designer are in a meeting. (1 + 1 = 2, so it’s plural)
Joined by “or” / “nor”: This is the classic “gotcha” question. When subjects are joined by “or” or “nor,” the verb must agree with the subject that is closest to it. This is called the “proximity rule.”
- Correct: Neither the manager nor the employees are happy. (The verb “are” is closer to the plural subject “employees.”)
- Correct: Neither the employees nor the manager is happy. (The verb “is” is closer to the singular subject “manager.”)
The Question to Ask: What word joins the subjects? If it’s “and,” use a plural verb. If it’s “or” or “nor,” simply look at the last subject in the list and match your verb to that one.
The Final Question: “What about the exceptions ‘I’ and ‘You’?”
The pronouns “I” and “you” are singular, but they are a special exception to the rule. They always take the plural verb form.
- Correct: I am… (This is its own unique form.)
- Correct: I walk… (NOT: I walks)
- Correct: You walk… (NOT: You walks)
In the end, mastering subject-verb agreement is a sign of a careful and professional writer. It is not about memorizing a hundred different rules, but about training your brain to be a detective—to pause, identify the true subject, and ask the right questions before you commit to a verb.
These fundamental rules of grammar are a cornerstone of clear and effective writing. They are detailed extensively in almost every major English-language style guide, such as the Associated Press (AP) Stylebook and The Chicago Manual of Style, which both dedicate significant space to resolving these common grammatical questions.