Subject-verb agreement is a fundamental aspect of English grammar that ensures clarity and correctness in written and spoken communication. It dictates that the verb in a sentence must agree in number with its subject. This means singular subjects take singular verbs, and plural subjects take plural verbs.
Mastering this rule is crucial for effective writing, as errors can lead to confusion and undermine the credibility of the writer. Understanding the nuances of subject-verb agreement can significantly enhance the precision and professionalism of one’s language.
Understanding the Basics: Singular and Plural Subjects
The most straightforward aspect of subject-verb agreement involves simple singular and plural subjects. A singular subject, referring to one person, place, thing, or idea, requires a singular verb. For instance, “The dog barks loudly.”
Conversely, a plural subject, referring to more than one, demands a plural verb. Consider the example, “The dogs bark loudly.” This fundamental principle forms the bedrock of all subject-verb agreement rules.
In the present tense, singular subjects often take verbs ending in “-s” or “-es,” while plural subjects typically use the base form of the verb. “She walks” versus “They walk” illustrates this common pattern.
Compound Subjects and Their Agreement
Compound subjects joined by “and” are generally plural and require a plural verb. For example, “John and Mary are going to the store.” The conjunction “and” links two distinct entities, creating a plural subject.
However, there are exceptions. If the compound subject refers to a single, unified idea or entity, a singular verb is used. “Peanut butter and jelly is my favorite sandwich.” Here, the two items are perceived as one dish.
When compound subjects are joined by “or,” “nor,” “either/or,” or “neither/nor,” the verb agrees with the subject closest to it. “Either the cat or the dogs are making noise.” The verb “are” agrees with “dogs,” the subject nearest the verb.
This proximity rule also applies when one subject is singular and the other is plural. “Neither the students nor the teacher understands the complex equation.” The singular verb “understands” aligns with “teacher,” which is closer to the verb.
Indefinite Pronouns and Subject-Verb Agreement
Indefinite pronouns present a unique set of challenges for subject-verb agreement. Some indefinite pronouns are always singular, regardless of the surrounding words. These include “each,” “either,” “neither,” “everyone,” “everybody,” “everything,” “someone,” “somebody,” “something,” “no one,” “nobody,” “nothing,” “anyone,” “anybody,” “anything,” and “one.”
For instance, “Everyone is invited to the party.” The pronoun “everyone” is singular, so the verb “is” must also be singular. This applies even if the sentence mentions multiple people. “Each of the participants has a unique role.”
Other indefinite pronouns are always plural. These include “both,” “few,” “many,” and “several.” “Both of the students are performing exceptionally well.” The plural pronoun “both” necessitates the plural verb “are.”
A third category of indefinite pronouns can be either singular or plural, depending on the context and the noun to which they refer. These include “all,” “any,” “more,” “most,” “none,” and “some.” When these pronouns refer to a singular noun or an uncountable noun, they take a singular verb.
For example, “Some of the water is still in the bottle.” Here, “water” is an uncountable noun, making “some” function as singular. “All of the cake has been eaten.” The singular verb “has” agrees with the singular concept of “cake.”
When these same pronouns refer to a plural noun, they take a plural verb. “Some of the apples are rotten.” The plural noun “apples” dictates the use of the plural verb “are.” “Most of the students have completed the assignment.”
Phrases Between Subject and Verb
Prepositional phrases, appositives, and other modifying phrases that come between the subject and the verb can often cause confusion. The verb must always agree with the subject, not with the noun in the intervening phrase. “The box of chocolates is on the table.”
In this sentence, “box” is the subject, and “of chocolates” is a prepositional phrase. The verb “is” correctly agrees with the singular subject “box,” not the plural noun “chocolates.” Similarly, “The members of the committee have voted.”
Appositives, which rename or explain the subject, also do not affect verb agreement. If the subject is singular, the verb remains singular, even if the appositive is plural. “My brother, a renowned scientist, has won an award.” The singular subject “brother” requires the singular verb “has.”
Careful identification of the true subject is paramount to avoid errors. Always look past descriptive phrases to find the core subject of the sentence. This ensures the verb aligns correctly with its grammatical antecedent.
Collective Nouns and Agreement
Collective nouns, such as “team,” “family,” “committee,” “government,” “audience,” and “class,” can be tricky because they represent a group of individuals but are grammatically singular. When the group is acting as a single unit, the collective noun takes a singular verb.
For example, “The team is practicing hard for the championship.” Here, “team” is treated as one entity. “The jury has reached its verdict.”
However, if the members of the group are acting as individuals, the collective noun can take a plural verb. This is more common in British English but is also accepted in American English in certain contexts. “The committee are divided on the issue.”
This distinction depends on whether the focus is on the group as a cohesive whole or on the individual actions of its members. When in doubt, consider the intended meaning and choose the verb that best reflects it. Clarity is key.
Subjects That Are Plural in Form but Singular in Meaning
Certain subjects appear plural because they end in “-s” but are actually singular in meaning. These typically include academic disciplines, titles of books or movies, and expressions of time or money.
Academic subjects like “mathematics,” “physics,” and “economics” are singular. “Mathematics is a challenging subject for many students.” The verb “is” agrees with the singular concept of mathematics.
Titles of creative works also follow this rule. “The ‘Lord of the Rings’ is a popular fantasy series.” The singular verb “is” correctly refers to the single title. “Moby Dick was written by Herman Melville.”
Expressions of time, money, and measurement are also treated as singular units. “Ten dollars is too much for this item.” The amount of money is considered a single sum. “Two weeks is not enough time for a vacation.”
Subjects That Are Singular in Form but Plural in Meaning
Conversely, some subjects are singular in form but plural in meaning, often referring to a quantity or a collection of items. For instance, “A number of students were absent.”
Here, “a number of” functions like a plural modifier, indicating many students. The plural verb “were” agrees with the implied plurality of the students. Contrast this with “The number of students absent was high.”
In the latter case, “The number” is the singular subject, referring to the quantity itself, hence the singular verb “was.” This subtle difference in phrasing significantly impacts verb agreement.
Other phrases that indicate a plural quantity, like “a lot of,” “plenty of,” or “a majority of,” require a plural verb when followed by a plural noun. “A lot of people attended the concert.” The plural noun “people” dictates the plural verb “attended.”
Relative Pronouns and Agreement
Relative pronouns like “who,” “whom,” “whose,” “which,” and “that” can introduce clauses that affect subject-verb agreement. The verb in a relative clause must agree with the antecedent of the relative pronoun.
When “who,” “which,” or “that” refers to a singular antecedent, the verb in the relative clause must be singular. “She is the artist who paints these vibrant landscapes.” The singular antecedent “artist” requires the singular verb “paints.”
When the relative pronoun refers to a plural antecedent, the verb in the relative clause must be plural. “They are the students who study diligently.” The plural antecedent “students” calls for the plural verb “study.”
A special case arises with “one of the…” constructions. The relative pronoun here refers to a plural antecedent, so the verb in the relative clause should be plural. “He is one of the employees who work overtime.” The antecedent is “employees,” which is plural.
Sentences Starting with “There” or “Here”
Sentences that begin with “there is,” “there are,” “here is,” or “here are” require the verb to agree with the noun that follows. These introductory words are not the subjects of the sentence. “There is a book on the shelf.”
The subject is “book,” which is singular, so the singular verb “is” is used. Conversely, “There are many books on the shelf.” The plural subject “books” requires the plural verb “are.”
This rule applies consistently, regardless of intervening phrases. “Here are the keys to your car.” The plural subject “keys” correctly takes the plural verb “are.”
Interrogative Sentences (Questions)
In questions, the subject often appears after the verb or an auxiliary verb. Identifying the subject accurately is crucial for correct agreement. “Does the train arrive on time?”
The auxiliary verb “Does” precedes the singular subject “train,” and the main verb “arrive” is in its base form. If the subject were plural, the structure would change. “Do the trains arrive on time?”
When the question word is part of the subject itself, the verb agrees with that subject. “Who is responsible for this mess?” The singular pronoun “Who” takes the singular verb “is.”
Implied Subjects and Commands
In imperative sentences, the subject is usually an implied “you,” which is always treated as plural. Therefore, imperative sentences typically use the base form of the verb, regardless of whether the command is directed at one person or many. “Close the door.”
The implied subject “you” is plural, so the verb “close” remains in its base form. “Listen carefully to the instructions.” This grammatical convention ensures consistency in commands.
Even when addressing a single person directly, the verb form remains the same. “John, sit down.” The underlying grammatical structure treats “you” as plural for imperative verbs. This rule simplifies the formation of commands.
Unusual Subject-Verb Agreement Scenarios
Certain phrases and constructions present unique challenges. For example, when a sentence includes fractions or percentages, the verb agrees with the noun that follows the fraction or percentage. “Half of the pie was eaten.”
Since “pie” is singular, the verb “was” is singular. If the noun were plural, the verb would be plural. “Half of the pies were eaten.”
Phrases like “as well as,” “along with,” and “in addition to” do not create compound subjects. The verb agrees with the first subject listed. “The manager, along with his employees, is attending the conference.” The singular subject “manager” dictates the singular verb “is.”
When a sentence contains an infinitive phrase or a gerund phrase as the subject, it is treated as singular. “To err is human.” The infinitive phrase “To err” acts as a singular subject. “Swimming every day improves health.” The gerund phrase “Swimming every day” is singular.
Avoiding Common Pitfalls
One common mistake is confusing the subject with an object in a prepositional phrase. Always identify the true subject before determining verb agreement. “The keys to the car are missing.” The subject is “keys,” not “car.”
Another pitfall is not recognizing when a pronoun is indefinite and always singular. Words like “everyone” and “anybody” require singular verbs, even if they seem to refer to multiple people. “Everyone agrees with the plan.”
Finally, be mindful of compound subjects joined by “or” or “nor.” The verb must agree with the subject closest to it. “Neither the students nor the teacher understands the material.” The verb “understands” agrees with “teacher.”