Subject-verb agreement is the grammatical rule that requires a sentence’s subject and finite verb to match in number. A singular subject takes a singular verb, while a plural subject takes a plural verb: The bird sings and The birds sing. The rule also covers person, auxiliary verbs, compound subjects, pronouns, quantities, and inverted sentences.
Key Facts
Subject-verb agreement connects the grammatical subject with the sentence’s finite verb.
Singular present-tense verbs usually end in -s or -es, while plural present-tense verbs usually do not.
Words between a subject and its verb do not normally change agreement.
Each, everyone, neither, and somebody take singular verbs in standard formal English.
A number of takes a plural verb, but the number of takes a singular verb.
In there is and there are sentences, the noun after the verb determines agreement.
What Is Subject-Verb Agreement?
Subject-verb agreement means that the subject and its finite verb use matching grammatical forms. Number is the main feature: The engine works has a singular subject and singular verb, while The engines work has a plural subject and plural verb.
The subject is the noun, pronoun, phrase, or clause that controls the verb. The subject is not always the noun closest to the verb. In The box of tools is heavy, box controls is; tools appears inside a prepositional phrase and does not control the verb.
Agreement is easiest to see in the simple present tense. A singular noun normally pairs with runs, needs, or does, while a plural noun pairs with run, need, or do. The verb be has more forms than most verbs, so agreement is visible in both present and past constructions.
Singular and plural examples
| Subject type | Correct verb | Example |
|---|---|---|
| Singular noun | walks | The child walks home. |
| Plural noun | walk | The children walk home. |
| Singular pronoun | has | She has a ticket. |
| Plural pronoun | have | They have tickets. |
| Singular subject with be | is | The answer is clear. |
| Plural subject with be | are | The answers are clear. |
What Are the Core Subject-Verb Agreement Rules?
The core rule is simple: identify the subject’s number, then select the finite verb form that matches it. In present-tense sentences, singular third-person verbs commonly add -s or -es, whereas plural subjects use the base form.
- The manager approves the request.
- The managers approve the request.
- A student studies every evening.
- Several students study every evening.
The apparent reversal in approves/approve causes many errors. The -s ending marks a singular present-tense verb, not a plural one. The noun ending behaves differently: books is plural, but reads is singular.
What changes in different tenses?
Subject-verb agreement is most visible in the present tense, because regular past-tense verbs usually have one form for singular and plural subjects. The analyst reviewed the file and The analysts reviewed the file both use reviewed.
The verb be remains an important exception:
| Tense or construction | Singular example | Plural example |
|---|---|---|
| Simple present | The report is ready. | The reports are ready. |
| Simple past | The report was ready. | The reports were ready. |
| Present perfect | The report has changed. | The reports have changed. |
| Past perfect | The report had changed. | The reports had changed. |
| Modal construction | The report can change. | The reports can change. |
| Do-support | The report does matter. | The reports do matter. |
Only the first auxiliary usually carries agreement in a verb chain. Compare The machine has stopped, The machines have stopped, and The machine does not stop. The participles stopped and the base verb stop do not change for subject number.
How Can You Find the Real Subject?
Find the finite verb, ask who or what performs the action or occupies the stated condition, and remove interrupting material mentally. The head noun of the subject phrase controls agreement, not an adjacent noun inside an of phrase, relative clause, or parenthetical expression.
Use this four-step test:
- Locate the finite verb. In The collection of maps is valuable, the finite verb is is.
- Ask who or what the sentence describes. What is valuable? The collection.
- Identify the head noun. The head noun is collection, not maps.
- Match the verb. Collection is singular, so use is.
Which words commonly distract writers?
| Distractor | Incorrect form | Correct form | Reason |
|---|---|---|---|
| Of phrase | The list of names are short. | The list of names is short. | List is the head noun. |
| Along with | The director, along with two aides, are present. | The director, along with two aides, is present. | The phrase is supplementary. |
| Relative clause | The reports that explain the change is useful. | The reports that explain the change are useful. | Reports controls the main verb. |
| Prepositional phrase | The key under the documents belong here. | The key under the documents belongs here. | Key is singular. |
| Parenthetical phrase | The proposal, including its amendments, need review. | The proposal, including its amendments, needs review. | The parenthesis does not add a subject. |
A useful editing habit is to draw a line through every phrase beginning with of, with, along with, together with, including, besides, or as well as. Then read the remaining subject and verb together.
How Do Compound Subjects Affect the Verb?
Compound subjects joined by and usually take a plural verb because they refer to two or more coordinated elements. The nurse and the physician work together is correct, as is Bread and butter are available when the items are treated separately.
A compound expression can take a singular verb when it names one combined idea, dish, title, or unit: Fish and chips is my usual order. Meaning controls the choice in these cases.
Subjects joined by or, nor, either…or, or neither…nor generally follow proximity agreement in standard English. The verb matches the nearer subject:
- Either the assistant or the managers are attending.
- Either the managers or the assistant is attending.
- Neither the driver nor the passengers were injured.
- Neither the passengers nor the driver was injured.
For formal writing, rewrite awkward proximity constructions when the subjects differ in number: The assistant or the managers will attend, or The managers or the assistant will attend. The modal will avoids a visibly mismatched pair.
Which Indefinite Pronouns Take Singular Verbs?
Indefinite pronouns such as everyone, each, either, neither, nobody, and someone take singular verbs in standard formal English. Pronouns such as both, few, many, and several take plural verbs, while all, any, most, none, and some vary according to the noun they represent.
| Pronoun group | Pronouns | Correct example |
|---|---|---|
| Singular | each, either, neither | Each of the plans has a weakness. |
| Singular | everyone, everybody, someone | Everyone needs an invitation. |
| Singular | anyone, nobody, no one | Nobody knows the answer. |
| Plural | both, few, many, several | Several were missing. |
| Variable | all, any, most, none, some | Some of the milk is cold. |
| Variable | all, any, most, none, some | Some of the bottles are cold. |
The noun after of determines the number of a variable pronoun. Most of the cake is gone uses singular is because cake is a mass noun. Most of the cakes are gone uses plural are because cakes is countable and plural.
How should singular “they” be handled?
Singular they takes plural verb forms: They are responsible, They have arrived, and They do not agree. The pronoun may refer to one person whose gender is unknown, irrelevant, or intentionally unspecified.
The verb agrees with the pronoun form, not with the number of people in the real-world group. Do not write they is or they has in standard English.
Are Collective Nouns Singular or Plural?
Collective nouns such as team, family, committee, audience, staff, and government may take singular or plural verbs depending on dialect and meaning. American English commonly treats the group as one unit, while British English more readily uses a plural verb when members act individually.
| Meaning | American-style example | British-style or individual example |
|---|---|---|
| One unit | The team is ready. | The team is ready. |
| Separate opinions | The committee is divided. | The committee are divided. |
| Individual actions | The family is eating together. | The family are choosing their seats. |
| Explicit members | The staff members are voting. | The staff members are voting. |
Use committee members, team members, or employees when individual action matters and the intended meaning must be unmistakable. A plural noun often produces clearer formal prose than relying on dialect-specific collective agreement.
How Does Agreement Work After There Is and There Are?
In existential constructions, there is a dummy subject, so the following noun determines the verb. Use there is before a singular noun or mass noun and there are before a plural noun.
- There is a delay in the schedule.
- There are three delays in the schedule.
- There is useful information in the report.
- There are several useful facts in the report.
In informal speech, there’s often precedes plural nouns, as in There’s two reasons. Standard formal writing should use there are two reasons. Questions follow the same rule: Is there a problem? and Are there problems?
When possible, rewrite existential sentences to make the subject and action more direct: The schedule contains a delay is often clearer than There is a delay in the schedule.
How Do Quantities, Fractions, and Percentages Agree?
Expressions of quantity generally agree with the noun after of, unless the expression has its own grammatical head. A number of students are absent, but the number of students is increasing because number is singular in the second construction.
| Expression | Correct verb | Example |
|---|---|---|
| A number of + plural noun | Plural | A number of applicants are waiting. |
| The number of + plural noun | Singular | The number of applicants is rising. |
| Fraction of + mass noun | Singular | Two-thirds of the water is clean. |
| Fraction of + plural noun | Plural | Two-thirds of the samples are clean. |
| Percentage of + mass noun | Singular | Forty percent of the land is protected. |
| Percentage of + plural noun | Plural | Forty percent of the parcels are protected. |
Decimal quantities follow the same meaning-based pattern: 0.5 liters is enough treats the measurement as one amount, while 0.5 liters were spilled emphasizes the physical quantity of liquid. In technical writing, rewrite the sentence if the intended interpretation could affect the result.
Which Nouns Look Plural but Take Singular Verbs?
Some nouns end in -s but refer to one subject, academic field, disease, or title. Mathematics is difficult, The news is encouraging, and Measles is contagious use singular verbs.
| Noun | Meaning | Example |
|---|---|---|
| Mathematics | Academic discipline | Mathematics is required. |
| Physics | Academic discipline | Physics explains motion. |
| Economics | Academic discipline | Economics is her major. |
| News | Information | The news was unexpected. |
| Measles | Disease | Measles is preventable. |
| The United States | Country name | The United States has regulations. |
Some nouns change according to meaning. Statistics is a difficult subject treats statistics as a field, while The statistics are reliable refers to numerical data. Politics is complicated describes the field; The politics of the decision are complicated can emphasize competing interests.
What Mistakes Appear Most Often?
The most common agreement errors occur when writers follow the nearest noun instead of the subject’s head noun. Writers also overgeneralize the -s rule, treating every verb ending in -s as plural or every noun ending in -s as plural.
- Package of chemicals: The package of chemicals have arrived should be has arrived.
- Gerund phrase: Running long distances are tiring should be is tiring because the activity is one singular subject.
- Infinitive phrase: To read difficult texts require patience should be requires patience.
- Each: Each of the students have a card should be has a card.
- Do-support: She do not understand should be does not understand.
- There construction: There is several causes should be There are several causes.
- Compound subject: The manager and assistant is available should be are available, unless the phrase identifies one combined role.
- Relative clause: The device that measure pressure is accurate should be The device that measures pressure is accurate.
Why are gerund and infinitive subjects singular?
A gerund phrase or infinitive phrase functioning as one subject takes a singular verb. Swimming in cold water is uncomfortable treats the entire activity as one idea, while The swimmers in cold water are uncomfortable has a plural noun subject.
Quoted words and titles also usually take singular verbs when treated as one unit: “The Birds” is the film’s title and “No” is an unacceptable answer. The visible plural form does not automatically determine agreement.
What Four-Step Test Finds Most Errors?
The four-step agreement test takes approximately 30-60 seconds for an ordinary sentence and works best when a writer marks the finite verb and ignores embedded phrases. The method is more reliable than choosing the noun closest to the verb.
- Circle the finite verb. In The results from the second trial indicate a problem, circle indicate.
- Ask who or what does the action. What indicates a problem? The results.
- Cross out distractions. Remove from the second trial.
- Check number and form. Results is plural, so indicate is correct.
For longer sentences, repeat the test for every independent clause. The report that the auditors prepared explains the issue, and the recommendations address the cause contains two subject-verb pairs: report explains and recommendations address.
How Do Inverted Sentences Affect Agreement?
In an inverted sentence, the subject follows the verb, so readers must identify the underlying subject rather than rely on normal word order. On the wall hang three portraits is correct because portraits is plural; On the wall hangs one portrait is singular.
Common inverted patterns include:
- Here comes the bus.
- Here come the buses.
- Behind the building stands a statue.
- Behind the building stand two statues.
- Only after the review were the errors discovered.
Questions also invert the auxiliary and subject: Does the engine work? and Do the engines work? The auxiliary carries agreement, while the main verb remains in its base form. Does the engine works is incorrect because two agreement-marked forms cannot occupy that structure.
When Should You Use a Grammar Tool?
A grammar checker is useful for locating probable agreement errors in long documents, but human review remains necessary for collective nouns, dialect variation, unusual inversion, and sentences with several clauses. Typical tools identify straightforward errors such as The results shows, but they may misread a technical noun phrase or a deliberately informal quotation.
| Method | Typical cost | Best use | Main limitation |
|---|---|---|---|
| Manual checklist | $0 | Short essays and emails | Requires grammatical attention |
| Built-in word processor checker | $0-$120 per year | Routine office documents | Limited explanation of complex errors |
| Premium grammar software | $60-$180 per year | Long professional drafts | False positives in specialized prose |
| Human editor or tutor | $30-$150 per hour | Repeated or high-stakes errors | Higher cost and scheduling constraints |
Use a tool after drafting, not as a substitute for understanding. If a checker repeatedly flags the same construction, record the pattern, such as confusion between each and they, then practice that structure directly.
Can Agreement Be Intentionally Broken?
Writers may reproduce nonstandard agreement in dialogue, song lyrics, regional speech, or characterization, but formal exposition should retain standard agreement. They was waiting can represent a character’s speech, while a business report should use They were waiting.
The distinction is functional rather than moral. Nonstandard forms can communicate identity or realism, but readers may interpret them as editing mistakes outside marked speech. Keep deliberate departures limited, consistent, and clearly attributable to a speaker.
What is subject-verb agreement not responsible for?
Subject-verb agreement does not determine verb tense, word choice, punctuation, or whether a sentence expresses a logical idea. The documents is complete has an agreement error, but The documents are complete may still be factually wrong or stylistically vague.
Agreement also does not require a verb to match every noun in the sentence. In The quality of the products has improved, quality controls has, while products receives the preposition of and has no control over the main verb.
What Is the Difference Between Subject and Object?
The subject controls the finite verb, while the object receives the action or follows a preposition. In The technician inspected the machines, technician controls inspected, and machines is the direct object.
Pronoun case can reveal the difference:
- She and I completed the audit. Both pronouns are subjects.
- The manager called her and me. Both pronouns are objects.
- The report surprised the reviewers. The report controls surprised.
- Between you and me, the conclusion is incomplete. Both pronouns follow a preposition.
A frequent error is allowing an object to control agreement: The effects of the policy concerns workers is wrong because effects is plural and requires concern.
FAQ
Does subject-verb agreement apply to every verb?
Subject-verb agreement applies to finite verbs, including main verbs and auxiliaries marked for tense or person. Nonfinite forms such as to run, running, and participles do not independently change for subject number. For example, She has written changes the auxiliary has, while written remains unchanged.
Is “the data is” grammatically correct?
Both the data is and the data are appear in current English, but the preferred form depends on meaning, style guide, and field. Scientific prose often treats data as a plural of datum, while general business writing frequently treats data as a mass noun. Follow the publication’s style policy consistently.
Should “none” take a singular or plural verb?
None may take a singular or plural verb depending on the noun and intended meaning. Use None of the water is clean for a mass noun and None of the samples are clean for plural count nouns. Formal edited English accepts both none is and none are when meaning supports the choice.
Why is “a number of” plural but “the number of” singular?
A number of means “several,” so the plural noun after it controls the verb: A number of applicants are waiting. The number of identifies one numerical total, making number the singular head noun: The number of applicants is rising.
Which is correct, “there is” or “there are”?
Use there is with a singular or mass noun and there are with a plural noun. Write There is a reason, There is evidence, and There are several reasons. Although there’s commonly appears before plural nouns in conversation, formal writing favors there are.
How long does it take to learn subject-verb agreement?
Most learners can understand the core rule in 30-90 minutes, but reliable editing usually requires 2-4 weeks of deliberate practice. Complex agreement involving inversion, collective nouns, relative clauses, and quantities improves through repeated sentence analysis rather than memorizing isolated examples.
The Bottom Line
Subject-verb agreement requires the subject and finite verb to match in grammatical number, with special attention to be, have, do, indefinite pronouns, collective nouns, quantities, compound subjects, and inverted constructions. The fastest dependable method is to locate the verb, identify the head noun, remove intervening words, and check the matching form. Apply that process to every clause, and the rules in this subject verb agreement definition, usage, and examples guide will cover most formal writing situations.
