Subject-verb agreement is the foundational pillar of English grammar that ensures a sentence remains logically consistent and grammatically sound. This linguistic principle dictates that the subject of a sentence and its primary verb must match in number, such as she runs, they run, the cat sleeps, the cats sleep, and I am. Mastery of this concept is essential for anyone looking to communicate with clarity and professionalism, including students, technical writers, and non-native speakers. When these elements are properly aligned, the sentence flows naturally, whereas a mismatch can lead to confusion and a lack of credibility in one’s writing. Understanding how to navigate complex subjects and various verb tenses is a vital skill for academic success and effective daily communication.
Table of Contents
- Defining Subject-Verb Agreement
- The Core Logic of Number and Person
- Rule 1: The Basic Singular and Plural Rule
- Rule 2: Compound Subjects with “And”
- Rule 3: Compound Subjects with “Or” and “Nor”
- Rule 4: Indefinite Pronouns as Subjects
- Rule 5: Collective Nouns and Their Nuances
- Rule 6: Intervening Phrases and Clauses
- Rule 7: Expressions of Quantity and Portions
- Rule 8: Inverted Sentence Structures (There is/There are)
- Rule 9: Titles, Names, and Plural-Form Singular Nouns
- Comprehensive Example Tables
- Common Mistakes and How to Avoid Them
- Advanced Topics: Modal Verbs and Subjunctive Mood
- Practice Exercises and Solutions
- Frequently Asked Questions (FAQ)
- Conclusion and Final Learning Tips
Defining Subject-Verb Agreement
At its most basic level, subject-verb agreement (SVA) is a grammatical rule stating that the verb in a sentence must match the number of the subject. If the subject is singular (representing one person, place, thing, or idea), the verb must also be singular. Conversely, if the subject is plural (representing more than one), the verb must be plural. This relationship is often referred to as “concord.”
The function of this agreement is to provide clarity and maintain the relationship between the “doer” of the action and the action itself. English is a language that relies heavily on word order and inflectional endings to convey meaning. While English has lost many of its historical verb endings, the third-person singular present tense remains a critical area where agreement is visible through the addition of an “-s” or “-es” to the verb.
This concept extends beyond simple nouns. It applies to pronouns, gerunds, infinitive phrases, and complex clauses. Whether you are writing a formal research paper or a casual email, adhering to these rules ensures that your message is conveyed without the distraction of “clunky” or incorrect phrasing that might lead a reader to question your command of the language.
The Core Logic of Number and Person
To understand the nine rules, we must first understand the two variables that determine the verb form: number and person. “Number” refers to whether the subject is singular (one) or plural (more than one). “Person” refers to the perspective of the speaker: first person (I/we), second person (you), or third person (he/she/it/they).
In the present tense, the third-person singular is the only form that typically changes its ending. We say “I walk” (first person) and “you walk” (second person), but “he walks” (third person singular). This specific “s” ending is the most common pitfall for learners. It is ironic that while a plural noun usually ends in “s” (dogs), a singular verb in the third person is the one that takes the “s” (the dog barks).
The following table illustrates the conjugation of the verb “to work” across different persons and numbers to show how the verb adapts to the subject.
| Person | Singular Subject | Singular Verb Form | Plural Subject | Plural Verb Form |
|---|---|---|---|---|
| First Person | I | work | We | work |
| Second Person | You | work | You (all) | work |
| Third Person | He / She / It | works | They | work |
Rule 1: The Basic Singular and Plural Rule
The fundamental rule is straightforward: a singular subject takes a singular verb, and a plural subject takes a plural verb. For regular verbs in the present tense, singular verbs (specifically for third-person subjects like “the boy” or “the car”) end in -s or -es. Plural verbs do not have this ending.
Consider the difference between “The student studies” and “The students study.” In the first sentence, the subject is a single person, so the verb takes the singular form. In the second, the subject is multiple people, so the verb remains in its base form. This rule applies regardless of whether the subject is a common noun, a proper noun, or a pronoun.
This rule becomes slightly more complex when using the verb “to be” (am, is, are, was, were) or “to have” (has, have). These irregular verbs must be memorized as they do not follow the standard “-s” addition pattern. For example, we say “The apple is red” but “The apples are red.”
Rule 2: Compound Subjects with “And”
When two or more subjects are joined by the conjunction “and,” they generally form a plural subject. This is because “and” acts as an additive, combining separate entities into a group. Therefore, a plural verb is required. For example: “The coach and the player are on the field.”
However, there is an important exception to this rule. If the two nouns joined by “and” refer to a single entity, idea, or person, the verb remains singular. This often happens with common pairings that are viewed as a single unit or dish. For instance, “Bacon and eggs is my favorite breakfast.” Here, the speaker is not discussing bacon and eggs as separate items but as a singular meal.
Another exception occurs when the word “each” or “every” precedes the compound subject. In the sentence “Every man and woman is required to register,” the word “every” distributes the action to each individual separately, necessitating a singular verb.
Rule 3: Compound Subjects with “Or” and “Nor”
Unlike “and,” the conjunctions “or” and “nor” do not add subjects together. Instead, they offer a choice or an alternative. The rule for these conjunctions is known as the Rule of Proximity. The verb must agree with the subject that is closest to it in the sentence.
If the subject closest to the verb is singular, the verb is singular. If the subject closest to the verb is plural, the verb is plural. For example, “Either the principal or the teachers are responsible.” Conversely, “Either the teachers or the principal is responsible.”
This rule applies similarly to “neither/nor” constructions. “Neither the jacket nor the shoes fit me.” In this case, “shoes” is plural and closest to the verb, so “fit” is used. If we swapped them: “Neither the shoes nor the jacket fits me,” the verb becomes singular to match “jacket.”
Rule 4: Indefinite Pronouns as Subjects
Indefinite pronouns are words that do not refer to a specific person or thing. They can be tricky because some are always singular, some are always plural, and some can be either depending on the context. Words like anybody, everyone, nothing, somebody, and each are always singular. Even though “everyone” implies a large group, it treats that group as a single collective unit.
On the other hand, pronouns like both, few, many, and several are always plural. “Many are called, but few are chosen.” These words clearly indicate more than one entity and thus require the plural verb form without the “-s” ending.
The most difficult group includes all, any, more, most, some, and none. These pronouns follow the “object of the preposition” rule. If the noun they refer to is uncountable or singular, use a singular verb. If the noun is countable and plural, use a plural verb. For example: “Some of the water is gone” vs. “Some of the cookies are gone.”
Rule 5: Collective Nouns and Their Nuances
Collective nouns are words that represent a group of individuals, such as team, family, jury, committee, and audience. In American English, these are almost always treated as singular because the group is acting as one single unit. We say, “The jury has reached a verdict,” because the jury acts as a whole.
However, if the members of the group are acting individually or are in disagreement, the noun can be treated as plural. For example, “The committee are arguing among themselves.” This indicates that the individuals within the committee are acting separately. In many cases, writers add the word “members” to avoid confusion: “The members of the committee are arguing.”
British English is much more flexible with collective nouns and often uses plural verbs for them (“The team are playing well”). However, for standardized tests and formal American English, the singular treatment is the standard expectation unless individual action is specifically highlighted.
Rule 6: Intervening Phrases and Clauses
One of the most common causes of agreement errors is the presence of words between the subject and the verb. These intervening phrases often contain a noun that is different in number from the actual subject. Phrases starting with along with, as well as, besides, including, and in addition to do not change the number of the subject.
For example, in the sentence “The politician, along with his aids, is arriving today,” the subject is “politician,” not “aids.” The phrase “along with his aids” is parenthetical information and should be mentally ignored when determining the verb form. The verb must agree only with the head noun of the subject phrase.
Similarly, prepositional phrases can be distracting. In “The box of ornaments is in the attic,” the subject is “box,” not “ornaments.” Writers often mistakenly see the plural “ornaments” near the verb and choose “are,” which is a grammatical error known as “attraction.”
Rule 7: Expressions of Quantity and Portions
When dealing with portions, such as percent, fraction, part, or half, the same rule used for “some” and “all” applies. You must look at the noun in the “of” phrase (the object of the preposition) to determine whether the verb should be singular or plural.
Consider these two sentences: “One-third of the city is unemployed” and “One-third of the people are unemployed.” In the first, “city” is a singular entity, so the verb is singular. In the second, “people” is a plural noun, so the verb is plural. This applies to percentages as well: “Fifty percent of the pie has been eaten” vs. “Fifty percent of the slices have been eaten.”
Distances, periods of time, and sums of money are usually treated as singular units. We say “Ten dollars is a high price” because we are thinking of the total amount as one sum, not as ten individual dollar bills. Likewise, “Five miles is too far to walk.”
Rule 8: Inverted Sentence Structures (There is/There are)
In most English sentences, the subject comes before the verb. However, in sentences beginning with “there” or “here,” the subject follows the verb. This inversion often leads to errors because the writer hasn’t yet identified the subject when choosing the verb. “There” and “here” are never the subjects.
If the subject following the verb is singular, use “is” or “was.” If the subject is plural, use “are” or “were.” For example: “There is a fly in my soup” and “There are four flies in my soup.” It is helpful to mentally flip the sentence: “A fly is there” or “Four flies are there” to check for agreement.
This also applies to questions. In the question “Where are the keys?” the subject is “keys,” which is plural, so the verb must be “are.” In “Where is the key?” the singular subject requires “is.”
Rule 9: Titles, Names, and Plural-Form Singular Nouns
Titles of books, movies, songs, and organizations are always singular, even if the title itself contains plural words. For example, “Star Wars is a classic film series.” Even though “Wars” is plural, the title refers to one specific intellectual property. Similarly, “The United Nations is headquartered in New York.”
Some nouns have a plural form (ending in -s) but are singular in meaning. These include fields of study like physics, mathematics, economics, and politics, as well as diseases like measles and mumps. We say, “Physics is a challenging subject,” not “Physics are.”
However, some words like scissors, trousers, shears, and pliers are always plural and require plural verbs unless they are preceded by the phrase “a pair of.” “The scissors are sharp,” but “The pair of scissors is sharp.”
Comprehensive Example Tables
To help solidify these rules, the following tables provide extensive examples across various categories. Reviewing these patterns will help you internalize the logic of subject-verb agreement.
The first table focuses on the Basic Rule and Compound Subjects. These are the most common scenarios you will encounter in daily writing and speaking.
| Subject Type | Example Sentence (Correct) | Explanation |
|---|---|---|
| Singular Noun | The cat meows loudly at night. | Singular subject “cat” takes singular verb with -s. |
| Plural Noun | The cats meow loudly at night. | Plural subject “cats” takes base verb without -s. |
| Compound (And) | John and Jane travel to France every year. | Two people joined by “and” make a plural subject. |
| Compound (Single Unit) | Macaroni and cheese is my comfort food. | A single dish/concept takes a singular verb. |
| Compound (Or – Singular) | Either the dog or the cat is making that noise. | “Cat” is singular and closest to the verb. |
| Compound (Or – Plural) | Either the cat or the dogs are making that noise. | “Dogs” is plural and closest to the verb. |
| Each/Every + Compound | Each tree and bush needs to be trimmed. | “Each” makes the subject singular. |
| Pronoun (He/She/It) | It seems like a beautiful day. | Third person singular pronoun needs -s. |
| Pronoun (They) | They seem happy with the results. | Third person plural pronoun uses base verb. |
| Compound (Nor) | Neither the rain nor the wind stops him. | “Wind” is singular and closest to the verb. |
| Proper Noun | London is a bustling city. | Singular city name takes singular verb. |
| Gerund Subject | Running is great for cardiovascular health. | Gerunds (verb+ing acting as nouns) are singular. |
| Infinitive Subject | To err is human; to forgive, divine. | Infinitives acting as subjects are singular. |
| Collective (American) | The family goes on vacation in July. | Family acts as one unit. |
| Collective (Individual) | The staff disagree on the new policy. | Staff acting as individuals. |
| Compound (With I) | He and I are going to the store. | Compound subjects including “I” are plural. |
| Money (Total) | Twenty dollars is too much for a burger. | Total sum is treated as singular. |
| Time (Total) | Three hours is a long time to wait. | Total duration is treated as singular. |
| Distance (Total) | Ten kilometers is the length of the race. | Total distance is treated as singular. |
| Mathematical Equation | Two plus two equals four. | Equations are usually treated as singular. |
The following table examines Indefinite Pronouns and Quantifiers. This is where most students struggle, as the “number” of these pronouns isn’t always intuitive.
| Pronoun Type | Example Sentence (Correct) | Verb Form |
|---|---|---|
| Anyone | Anyone is welcome to attend the meeting. | Singular |
| Everyone | Everyone has finished their homework. | Singular |
| No one | No one knows the answer to the riddle. | Singular |
| Something | Something smells delicious in the kitchen. | Singular |
| Everything | Everything was lost in the fire. | Singular |
| Each | Each of the students receives a trophy. | Singular |
| Neither (Alone) | Neither of the plans works for me. | Singular |
| Either (Alone) | Either is fine with me. | Singular |
| Many | Many were invited to the gala. | Plural |
| Few | Few understand the complexity of the issue. | Plural |
| Several | Several have already left the party. | Plural |
| Both | Both are qualified for the position. | Plural |
| Some (Uncountable) | Some of the milk has spilled. | Singular |
| Some (Countable) | Some of the books are missing. | Plural |
| All (Uncountable) | All of the equipment is new. | Singular |
| All (Countable) | All of the employees were present. | Plural |
| Most (Uncountable) | Most of the news is depressing. | Singular |
| Most (Countable) | Most of the voters support the bill. | Plural |
| None (Uncountable) | None of the water is safe to drink. | Singular |
| None (Countable) | None of the students have failed. | Plural (Common Usage) |
Finally, let’s look at Intervening Phrases and Special Nouns. This table highlights how to identify the true subject when other words try to distract you.
| Distractor Type | Example Sentence (Correct) | True Subject |
|---|---|---|
| Prepositional Phrase | The colors of the rainbow are beautiful. | Colors |
| “As well as” Phrase | The mayor, as well as the citizens, hopes for peace. | Mayor |
| “In addition to” Phrase | Stress, in addition to poor diet, affects health. | Stress |
| “Along with” Phrase | The captain, along with the crew, salutes the flag. | Captain |
| Relative Clause | The man who lives next to the dogs is very quiet. | Man |
| Plural-form Subject | Economics is an essential field of study. | Economics |
| Plural-form Subject | Statistics is a difficult class (as a subject). | Statistics |
| Plural-form Subject | The news starts at six o’clock. | News |
| “A pair of” Phrase | A pair of pants is hanging in the closet. | Pair |
| Nouns with no “pair” | The pants are hanging in the closet. | Pants |
| Inverted (There) | There are many reasons to be happy. | Reasons |
| Inverted (Here) | Here is the report you requested. | Report |
| Title of Work | Great Expectations is a long novel. | Title |
| Organization Name | General Motors has announced new layoffs. | Organization |
| Gerund Phrase | Eating vegetables is good for you. | Eating |
| “One of” Phrase | One of the cars is broken. | One |
| “The number of” | The number of attendees is increasing. | Number |
| “A number of” | A number of people are waiting outside. | People (Idiomatic) |
| “The majority” | The majority holds the power. | Majority |
| “The majority of…” | The majority of voters want change. | Voters |
Usage Rules: Comprehensive Coverage
While the nine rules provide a strong framework, applying them requires attention to detail. One critical aspect of usage is the tense of the sentence. Subject-verb agreement is most visible in the present tense. In the simple past tense, most verbs do not change based on the subject (e.g., “I walked,” “he walked,” “they walked”). The major exception is the verb “to be,” which uses “was” for singular and “were” for plural.
Another area of focus is Relative Pronouns (who, which, that). When these words act as the subject of a dependent clause, the verb must agree with the noun the pronoun refers to (the antecedent). For example: “It is I who am responsible.” Here, “who” refers to “I,” so the verb is “am.” This sounds strange to many, but it is grammatically correct. Similarly, “He is one of those people who are always late.” In this case, “who” refers to “people,” not “one.”
Lastly, consider Parenthetical Expressions. Words enclosed in commas, parentheses, or dashes do not count as part of the subject. If you can remove the phrase and the sentence still makes sense, the verb should ignore that phrase. “The house (and its contents) is insured.” The subject is “house,” and the parenthetical “and its contents” does not make it plural.
Common Mistakes and How to Avoid Them
The most frequent error is Proximity Error, where the writer matches the verb to the nearest noun rather than the actual subject. This usually happens with prepositional phrases. To avoid this, always identify the “head” of the subject phrase. Ask yourself: “Who or what is performing the action?” If the sentence is “A group of students is/are coming,” ask “What is coming?” The group is coming. Therefore, “is” is the correct choice.
Another common mistake involves Indefinite Pronouns like “each” and “everyone.” Because these words imply a group, many writers instinctively use a plural verb. Remember that in formal English, these words focus on the individuals within the group one at a time, making them singular. “Everyone has their own opinion” is correct, while “Everyone have” is a major error.
| Incorrect Sentence | Correct Sentence | Rule Violated |
|---|---|---|
| The list of items are on the desk. | The list of items is on the desk. | Intervening Phrase |
| Every one of the cakes were eaten. | Every one of the cakes was eaten. | Indefinite Pronoun |
| There is three birds on the fence. | There are three birds on the fence. | Inverted Structure |
| The team are celebrating the win. | The team is celebrating the win. | Collective Noun |
| Neither the boss nor the workers likes the plan. | Neither the boss nor the workers like the plan. | Rule of Proximity |
| Politics are a dirty business. | Politics is a dirty business. | Plural-Form Singular |
| The scissors is on the table. | The scissors are on the table. | Always Plural Noun |
| He and his friend goes to the gym. | He and his friend go to the gym. | Compound Subject (And) |
Advanced Topics: Modal Verbs and Subjunctive Mood
For advanced learners, it is important to note that Modal Verbs (can, could, shall, should, will, would, may, might, must) do not change their form regardless of the subject. We say “He can swim” and “They can swim.” There is no “s” added to modal verbs. This simplifies agreement but can sometimes lead to confusion for those used to the third-person singular rule.
The Subjunctive Mood is another area where standard agreement rules are suspended. The subjunctive is used for hypothetical situations, wishes, or suggestions. In the subjunctive, the verb “to be” becomes “were” for all subjects, including singular ones. Example: “If I were you, I would go.” Even though “I” is singular, “were” is used because the situation is hypothetical. Similarly, in a “that” clause expressing a demand: “I suggest that he arrive on time.” Here, “arrive” is used instead of “arrives.”
Practice Exercises and Solutions
Test your knowledge with these exercises. Try to identify the subject first, then choose the correct verb form based on the nine rules discussed.
Exercise 1: Basic and Compound Subjects
Choose the correct verb in the parentheses.
- The boy (walk / walks) to school every day.
- My dog and my cat (chase / chases) each other.
- Either the keys or the wallet (is / are) on the counter.
- Bread and butter (is / are) a simple snack.
- The players, as well as the coach, (want / wants) to win.
- Every student (has / have) a locker.
- Neither the apple nor the pears (is / are) ripe.
- The committee (decide / decides) on the budget today.
- Mathematics (is / are) my favorite subject.
- There (is / are) many ways to solve the problem.
Exercise 2: Indefinite Pronouns and Quantifiers
Identify and correct the agreement error in each sentence. If the sentence is correct, write “Correct.”
- Everyone in the room were laughing at the joke.
- Some of the pie has been eaten by the kids.
- Many of the students is planning to go to college.
- Each of the boxes weigh ten pounds.
- All of the sugar are in the bowl.
- Nobody knows the secret password.
- Both of the sisters is very talented.
- Most of the water have evaporated.
- Several of the trees was blown down by the wind.
- None of the candidates has responded yet.
Solutions to Exercises
| Question # | Exercise 1 Answers | Exercise 2 Corrections |
|---|---|---|
| 1 | walks | Everyone… was laughing. |
| 2 | chase | Correct |
| 3 | is | Many… are planning. |
| 4 | is | Each… weighs. |
| 5 | want | All of the sugar is. |
| 6 | has | Correct |
| 7 | are | Both… are. |
| 8 | decides | Water has evaporated. |
| 9 | is | Several… were blown. |
| 10 | are | Correct (or “have”) |
Frequently Asked Questions (FAQ)
1. Why do we add “s” to singular verbs but “s” to plural nouns?
This is a quirk of English historical linguistics. In the present tense, the third-person singular (he, she, it) is the only form that retained a distinct marker from Old English. While plural nouns use “s” to show more than one, the “s” on a verb is a person-marker, not a plural-marker. It is helpful to think of it as a “balancing act”: usually, either the subject or the verb has an “s,” but rarely both.
2. Is “none” singular or plural?
This is a debated topic. Traditionally, “none” was considered singular because it meant “not one.” However, in modern usage, it is treated as plural when it refers to a plural noun (e.g., “None of the guests have arrived”). Both are generally accepted, but using the plural form often sounds more natural in contemporary speech.
3. How do I handle subjects like “the number of” vs. “a number of”?
“The number of” is always singular because it refers to the specific numerical value (e.g., “The number of students is 20″). “A number of” functions like “some” or “many” and is always plural (e.g., “A number of students are absent”).
4. Do titles of books always take a singular verb?
Yes, regardless of the words in the title. Even if a book is titled The Seven Wonders of the World, you would say “The Seven Wonders of the World is a fascinating read.” You are referring to the single entity of the book.
5. What happens when the subject is “I” in a compound subject?
When “I” is part of a compound subject joined by “and,” the verb is plural. For example, “My brother and I are going.” Use the “am” form only when “I” is the sole subject or the closest subject in an “or/nor” construction (though “or I” constructions are rare and often rephrased for better flow).
6. Are “data” and “media” singular or plural?
Technically, “data” and “media” are the plural forms of “datum” and “medium.” In scientific and highly formal contexts, they take plural verbs (“The data show…”). However, in common usage, they are often treated as singular collective nouns (“The data is inconclusive”).
7. What is the “Rule of Proximity”?
The Rule of Proximity applies to compound subjects joined by “or” or “nor.” It states that the verb must agree with the noun or pronoun that is physically closest to it in the sentence. This prevents awkward-sounding sentences where a singular verb might follow a plural noun.
8. Does the verb agree with the subject or the complement?
The verb always agrees with the subject, even if the complement (the word following the verb) is different in number. For example: “The best part of the meal is the desserts.” Even though “desserts” is plural, the subject is “part,” so the verb is singular.
Conclusion and Final Learning Tips
Subject-verb agreement is more than just a set of rules; it is the logic that holds English sentences together. By mastering the nine rules—ranging from basic singular/plural agreement to the nuances of collective nouns and inverted structures—you can significantly improve the clarity and professionalism of your writing. Remember to always identify the true subject of the sentence, ignoring any distracting phrases that might lie in between. Consistent practice is the key to making these rules second nature. When in doubt, try simplifying the sentence to its core components (Subject + Verb) to see if it still makes sense. With time, you will develop an “ear” for agreement, allowing you to communicate with confidence and precision in any setting.
