What are Subject-Verb Agreement?
In English, the present tense verb changes form depending on whether the subject is singular or plural. For most verbs, the third-person singular adds -s (she runs, it works, the manager decides). Plural subjects take the base form with no -s (they run, the managers decide).
The rule sounds simple, but agreement errors are extremely common — usually because the grammatical subject is separated from the verb by a long phrase, or because the subject itself is an unusual form (a collective noun, an indefinite pronoun, or a compound joined by or/nor).
At B1 level, subject-verb agreement errors in writing are red-flag mistakes. Examiners notice them immediately because they suggest the writer is not in control of basic sentence structure.
Core Agreement Pattern
The rule applies to the present simple and to the verb 'be' in all tenses. For regular verbs, singular third-person adds -s or -es. For 'be', the changes are: I am, he/she/it is, you/we/they are (present); he/she/it was, you/we/they were (past).
Singular subject + singular verb / Plural subject + plural verbPresent Simple Agreement
| Subject | Verb form | Example |
|---|---|---|
| I / You / We / They | base form | They work late every Friday. |
| He / She / It | base form + -s | She works late every Friday. |
| The data / The team | depends — see below | The team meets on Mondays. |
Be — Present and Past
'Be' has the most irregular agreement pattern and is also the most frequently used verb — get these right.
| Subject | Present | Past |
|---|---|---|
| I | am | was |
| He / She / It | is | was |
| You / We / They | are | were |
Agreement Rules for Tricky Subjects
Subject separated from the verb by a phrase
When a prepositional phrase or relative clause appears between the subject and verb, the verb must still agree with the grammatical subject — not with the noun nearest to it. The intervening noun is part of the modifier, not the subject.
- The box of chocolates is on the counter. (subject: 'box', not 'chocolates')
- The results of the experiment suggest a new approach. (subject: 'results')
- A list of requirements has been sent to all applicants. (subject: 'list')
Collective nouns
Words like team, committee, staff, government, family, and audience refer to a group. In American English they nearly always take a singular verb. In British English they can take a plural verb when the focus is on individual members. Academic and exam contexts generally prefer singular.
- The committee has reached a decision. (group as a unit)
- The government is reviewing the policy.
- The team are arguing among themselves. (BrE — individual members)
Indefinite pronouns
Pronouns like everyone, someone, anyone, nobody, each, either, neither, one always take a singular verb — even though they feel plural in meaning. This is one of the most common agreement errors at B1–B2 level.
- Everyone in the office has received a copy.
- Each of the documents needs a signature.
- Neither of the answers was correct.
- Nobody knows what happened.
Compound subjects with or / nor / either-or / neither-nor
When a compound subject is joined by or, nor, either…or, or neither…nor, the verb agrees with the subject nearest to it (the one closest to the verb). This is called the proximity rule.
- Either the manager or the assistants are responsible. ('assistants' is nearest → plural)
- Either the assistants or the manager is responsible. ('manager' is nearest → singular)
- Neither the report nor the slides were ready.
Compound subjects joined by and
Two or more subjects joined by and form a plural subject and take a plural verb. The exception is when the two nouns always refer to the same thing or are felt as one unit.
- Sarah and her colleague are presenting tomorrow.
- The manager and the team agree on the timeline.
- Bread and butter is all I need. (one dish — exception)
- The chair and CEO is attending. (same person — exception)
Red-Flag Patterns — Check Agreement Here
Singular vs Plural Agreement — Close Calls
These pairs cause consistent errors even at B2–C1 level. The grammatical rule and the intuitive sense of the sentence often pull in opposite directions.
Intervening plural — singular verb
The quality of the reports <hl>has</hl> improved.
Subject is 'quality' (singular). 'Reports' is in the prepositional phrase.
Plural subject — plural verb
The reports <hl>have</hl> improved.
Subject is 'reports' (plural). No intervening phrase.
Each — always singular
Each of the candidates <hl>was</hl> interviewed separately.
'Each' is singular. 'Candidates' is the object of 'of', not the subject.
All — agrees with the noun
All of the candidates <hl>were</hl> interviewed separately.
'All' can be plural here because 'candidates' is plural.
Common Mistakes
Agreeing with the nearest noun instead of the subject
✗ The cause of the delays are unclear.
The cause of the delays is unclear.
'Cause' is the grammatical subject — singular. 'Delays' is inside the prepositional phrase 'of the delays' and plays no role in agreement.
Treating indefinite pronouns as plural
✗ Everyone in the workshops were given a certificate.
Everyone in the workshops was given a certificate.
'Everyone', 'someone', 'nobody', 'each' are grammatically singular and always take singular verbs — regardless of how many people they refer to.
Wrong collective noun agreement
✗ The committee have decided — they will vote again.
The committee has decided — it will vote again.
In formal writing and most exam contexts, collective nouns take a singular verb and are referred back to with 'it'. Using 'they' alongside a singular verb creates inconsistency.
Ignoring the proximity rule with or/nor
✗ Either the assistant or the directors has the file.
Either the assistant or the directors have the file.
With or/nor, the verb agrees with the nearest subject. 'Directors' (plural) is nearest to the verb → 'have'.
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