This article is part of our English Grammar Learning Hub.
Subject-verb agreement is one of the most fundamental rules of English grammar. At its core, it is simple: singular subjects take singular verbs, and plural subjects take plural verbs. In practice, however, several categories of sentence construction create genuine difficulty — even for advanced learners. This guide covers the rules systematically and highlights the mistakes that appear most frequently in writing and speaking.
The Basic Rule
In any English sentence, the main verb must agree with its subject in number (singular or plural).
- The student works hard. (singular subject, singular verb)
- The students work hard. (plural subject, plural verb)
- The student work hard.
- The students works hard.
This rule applies most clearly in the present simple tense, where the singular/plural distinction affects the verb form. In the past simple, most verbs have the same form for all subjects (walked, ran, said) — except for to be: was/were.
The Third-Person -s
In the present simple tense, third-person singular subjects require the verb to end in -s or -es. This applies to he, she, it and all singular nouns.
| Subject | Verb |
|---|---|
| I / You / We / They | run / eat / think |
| He / She / It / The dog | runs / eats / thinks |
Spelling rules for the -s ending: add -es to verbs ending in -s, -sh, -ch, -x, -z (watches, teaches, buzzes); change -y to -ies after a consonant (studies, flies). Practise the form in our free grammar exercises.
Compound Subjects with and / or
Subjects joined by and
When two subjects are joined by and, they form a plural compound subject and take a plural verb:
- Tom and Sarah are studying together.
- The teacher and the students have agreed.
Exception: When both nouns together refer to a single concept or person, a singular verb is used: Bread and butter is my favourite breakfast. The director and founder was present.
Subjects joined by or / nor
With or, nor, either...or, neither...nor, the verb agrees with the subject closest to it (the proximity rule):
- Either the teacher or the students are responsible. (students = plural)
- Either the students or the teacher is responsible. (teacher = singular)
- Neither he nor I am to blame.
Collective Nouns
Collective nouns refer to groups of people or things: team, class, government, staff, family, committee, audience, jury, crowd.
- In British English, collective nouns often take a plural verb (emphasising individual members): The team are playing well.
- In American English, collective nouns usually take a singular verb: The team is playing well.
Both forms are grammatically correct. Choose one and be consistent. In academic writing, check which variety your institution requires. Explore more British/American differences in our vocabulary exercises.
Indefinite Pronouns
Indefinite pronouns are among the most frequent sources of subject-verb agreement errors. Most take a singular verb:
- Everyone, someone, anyone, no one — Everyone is welcome.
- Everything, something, anything, nothing — Nothing has changed.
- Each, either, neither — Each student has a textbook.
- Every + noun — Every answer was correct.
The following take a plural verb because they refer to multiple items:
- Both, several, many, few — Both options are available.
Some pronouns are variable — they agree with the noun in a following of-phrase: some, any, all, most, none, half:
- All of the water has evaporated. (uncountable = singular)
- All of the students have arrived. (countable plural = plural)
- None of the information is correct.
- None of the answers were correct.
Intervening Phrases
A very common mistake occurs when a prepositional phrase, relative clause, or parenthetical expression appears between the subject and the verb. The verb must still agree with the true subject, not with the nearest noun.
The quality of these products are excellent. — Wrong: the subject is quality (singular), not products.
The quality of these products is excellent.
- The list of requirements is long. (subject = list)
- The members of the committee are ready. (subject = members)
- A box of chocolates was left on the table. (subject = box)
Quantity Expressions
Expressions of quantity follow specific patterns worth memorising:
| Expression | Verb | Example |
|---|---|---|
| a number of | Plural | A number of students were absent. |
| the number of | Singular | The number of applications is rising. |
| a lot of + uncountable | Singular | A lot of work remains. |
| a lot of + countable plural | Plural | A lot of people were there. |
| half of + uncountable | Singular | Half of the information is wrong. |
| half of + plural | Plural | Half of the students have finished. |
More Tricky Cases
Titles and Names
Titles of books, films, companies, newspapers, and works of art take a singular verb, even when the title contains plural words:
- The Times is a British newspaper.
- Great Expectations is set in Victorian England.
There is / There are
In sentences beginning with there, the verb agrees with the noun that follows it (the real subject):
- There is a problem.
- There are several problems.
- There is many reasons.
Subjects ending in -ics
Words such as mathematics, economics, physics, politics, news look plural but are singular:
- Mathematics is my favourite subject.
- The news is on at six.
Test all these patterns with our interactive quiz and grammar exercises.
- The verb must agree with its subject in number — singular with singular, plural with plural.
- Third-person singular present simple verbs end in -s or -es.
- Subjects joined by and take a plural verb; with or/nor the verb agrees with the nearest subject.
- Most indefinite pronouns (everyone, nobody, each) are singular and take singular verbs.
- Variable pronouns (all, some, none, half) agree with the noun in the following of-phrase.
- Phrases between subject and verb do not change verb agreement — focus on the true subject.
- Words ending in -ics (mathematics, economics) and collective nouns (news) are singular.
Check your subject-verb agreement
Put the rules into practice with our free interactive exercises and get instant feedback.
Start Practising NowFrequently Asked Questions
Subject-verb agreement means that the verb in a sentence must match the subject in number (singular or plural) and person. A singular subject takes a singular verb, and a plural subject takes a plural verb.
In the present simple tense, third-person singular subjects (he, she, it, and singular nouns) require the verb to add -s or -es. This is unique to the third person singular: I run, you run, he runs, they run.
In British English, collective nouns (team, government, family, staff) are often treated as plural because they refer to a group of individuals. In American English, they are usually treated as singular. Both are acceptable depending on context and variety.
Most indefinite pronouns (everyone, someone, nobody, each, either, neither, anything) take a singular verb, even though they may seem to refer to multiple people. Example: Everyone is welcome. Nobody has arrived yet.
With either...or and neither...nor, the verb agrees with the subject that is closest to it. Example: Neither the teacher nor the students are ready. Either the students or the teacher is responsible.
No. Prepositional phrases or relative clauses between the subject and verb do not change the verb form. Example: The box of chocolates is on the table. The subject is box (singular), not chocolates.
When two subjects are joined by and, the combined subject is plural and takes a plural verb. Example: Tom and Sarah are studying for their exams. Exception: When the two nouns refer to a single unit (bread and butter is my favourite), a singular verb is used.
Titles of books, films, companies, and works of art are treated as singular, even if they contain plural words. Example: 'The Grapes of Wrath' is a famous novel.
A number of takes a plural verb; the number of takes a singular verb. Fractions and percentages agree with the noun that follows of: Half of the students have finished. Half of the water has evaporated.
LexFizz provides free interactive grammar exercises where you can practise subject-verb agreement with immediate feedback. Consistent targeted practice is the fastest route to accuracy.