In Nouns and Countability you learned the golden rule of agreement: the verb matches the head noun, the boss of the subject team, not whatever noun happens to sit nearest. That handles most sentences cleanly. But English keeps a handful of awkward cases that catch even advanced learners: group words like team, pairs like either…or, and sneaky words like everyone that look plural but behave singular. We'll take each one slowly, with the rule and plenty of examples. You already hold the key idea; now we handle the exceptions.
1. Why this post exists
In simple sentences, agreement is easy: The dog runs. The dogs run. One thing → singular verb; many things → plural verb. You learned in Nouns and Countability: The Word That Controls the Sentence to find the head noun and match the verb to it.
But real English, especially formal writing, news, and academic texts, produces sentences where your gut feeling about "singular or plural" can be wrong. These are the cases where the head noun is far from the verb, or where a word's grammatical form fights with its meaning.
Here's the good news: there aren't many of these tricky cases, about eight of them, and each has a clear rule. We'll take them one by one. Once you know them, you'll handle agreement better than most native speakers do in writing.
A note on the rule of thumb: Through all of these cases, one principle keeps saving you: find the real boss (head noun) of the subject, then match the verb to it. The tricky cases are really just situations where finding the true boss takes a little extra care.
2. Tricky Case 1, Words in between don't change the verb
We met this in Nouns and Countability: The Word That Controls the Sentence, but it's so important (and so common) that we'll reinforce it. Words that sit between the head noun and the verb do not change the verb. The verb still matches the head noun.
The quality of the results is remarkable.
- Head noun (boss) = quality (singular).
- of the results sits in between, but it's just describing quality. It does NOT control the verb.
- So the verb is is (singular), matching quality, even though results (plural) sits right before the verb.
More examples:
- The box of chocolates is on the table. (boss = box, singular → is)
- The leader of the workers has arrived. (boss = leader, singular → has)
- The students in the program are talented. (boss = students, plural → are)
The rule: when you see "[noun] of [noun] + verb," the verb matches the first noun (the boss), not the one inside the of-phrase.
Quick recap: Words between the head noun and the verb (especially of... phrases) do NOT change the verb. Match the verb to the boss. The quality of the results IS remarkable (boss = quality).
3. Tricky Case 2, Group words (collective nouns)
A collective noun is a word that names a group as a single unit. Examples: team, committee, family, government, staff, audience, class, company.
The tricky part: a group is one thing (the team), but it's made of many people (the players). So should the verb be singular or plural? The answer depends on how you're thinking about the group:
- If the group acts together as one unit → singular verb.
- If the members act separately as individuals → plural verb.
Look:
- The committee has reached a decision. → They acted together (one decision) → singular has. ✓
- The committee are arguing with each other. → The members are acting separately (arguing among themselves) → plural are. ✓
Both are correct; they just describe different situations. In the first, the committee is one unit making one decision. In the second, the members are behaving as separate individuals.
A practical tip for writing: In formal/academic writing, the safest habit is to treat collective nouns as singular (one unit) unless you specifically mean the members acting separately. And whatever you choose, be consistent within a piece of writing. Don't say "The team is winning, and they are happy" in a way that flips back and forth confusingly.
Worth repeating: Group words (team, committee, family) take a singular verb when the group acts as ONE unit (The team is winning), and a plural verb when the members act SEPARATELY (The team are arguing among themselves). Be consistent.
4. Tricky Case 3, "either…or" and "neither…nor" (the nearest one wins)
These connecting pairs join two subjects:
- either A or B (one or the other)
- neither A nor B (not one and not the other)
When the two subjects are different in number (one singular, one plural), which one does the verb match? The rule is delightfully simple:
The verb matches the subject NEAREST to it: the second one, the one right before the verb.
Watch:
- Either the director or the staff members are responsible. → staff members (plural) is nearest the verb → are. ✓
- Either the staff members or the director is responsible. → director (singular) is nearest → is. ✓
- Neither the data nor the methodology was convincing. → methodology (singular) is nearest → was. ✓
- Neither the report nor the results were ready. → results (plural) is nearest → were. ✓
So the order you put the subjects in changes the verb! Whichever subject ends up right before the verb is the one the verb matches. This is called proximity agreement ("proximity" means "nearness").
Lock this in: With either…or / neither…nor, the verb matches the NEAREST subject (the one right before the verb). Either the staff or the director IS responsible (director is nearest → is).
5. Tricky Case 4, "a number of" vs. "the number of"
This is one of the most-tested points in formal English, and the two phrases look almost identical, but they behave oppositely. Read carefully.
"a number of" means several / many. It's just a quantity word. The real boss is the noun after it (which is plural), so the verb is plural:
- A number of studies have confirmed this. → a number of = "several"; boss = studies (plural) → have. ✓
- A number of people were waiting. → were (plural). ✓
"the number of" means the count itself, a single quantity. Here the boss is the word number (singular), so the verb is singular:
- The number of studies is increasing. → boss = number (singular); of studies just describes it → is. ✓
- The number of errors was small. → was (singular). ✓
Think of it this way:
- a number of = "lots of [things]" → focus on the things → plural
- the number of = "the count" → focus on the single count → singular
A quick reminder: A number of = "several" → plural verb (A number of studies HAVE...). The number of = "the count itself" → singular verb (The number of studies IS...). One little word (a vs. the) flips the verb!
6. Tricky Case 5, Words like "everyone" (always singular)
Some words feel plural because they seem to talk about many people, but grammatically they are always singular and take a singular verb. These are called indefinite pronouns.
Here they are:
- everyone, everybody, everything
- someone, somebody, something
- anyone, anybody, anything
- no one, nobody, nothing
- each, every, either, neither
All of these take a singular verb:
- Everyone has submitted the report. → has (singular), even though "everyone" means many people!
- Each of the samples was tested. → was (singular). (samples is plural, but it's inside an of-phrase: the boss is each, singular.)
- Neither of the conclusions is convincing. → is (singular).
- Somebody needs to help. → needs (singular).
- Nothing was wrong. → was (singular).
The trickiest is when each or neither is followed by of + plural noun. Don't be fooled by the plural noun!
- Each of the students is ready. → boss = each (singular) → is. (Not are, even though students is plural.)
A note about "their": You'll often see Everyone has submitted their report. You might wonder: "everyone is singular, so why their (which feels plural)?" In modern English, they/their is widely accepted as a friendly, gender-neutral way to say "his or her." It's correct. But notice: even with their, the verb stays singular, Everyone has submitted their report. The verb (has) is the part that must stay singular.
Say it again: Words like everyone, somebody, each, neither, nothing are ALWAYS singular and take a singular verb, even when they seem to mean many people. Everyone HAS arrived. Each of the students IS ready.
7. Tricky Case 6, "none" (singular is safest)
The word none means "not one / not any." Traditionally it's singular, but modern English often allows plural when it's followed by a plural noun. Both of these are seen:
- None of the data is reliable. → singular (traditional, formal)
- None of the samples were damaged. → plural (common, widely accepted)
For formal writing: singular is the safer choice. And as always, be consistent.
Hold onto this: None is traditionally singular (None of the data is...), but plural is accepted with plural nouns (None of the samples were...). For formal writing, singular is safest.
8. Tricky Case 7, Words that end in "-s" but are singular
Some words look plural (they end in -s) but are actually singular in meaning, so they take a singular verb. The main groups:
Fields of study (subjects you can learn):
- Mathematics is difficult. → is (singular)
- Physics explains the world. → explains (singular)
- Economics is my favorite subject. → is
Some everyday nouns:
- The news is sad. → is (singular, "news" is uncountable/singular)
- Measles is a disease. → is
The tricky double-life word: "statistics"
- Statistics as a field of study → singular: Statistics is a branch of mathematics.
- statistics as data/numbers → plural: The statistics show a strong trend.
So statistics can be singular or plural depending on its meaning! When it means the school subject, it's singular. When it means the actual numbers, it's plural.
One more time: Some -s words are singular: fields of study (Mathematics is..., Physics explains...) and a few nouns (The news is...). But statistics = singular as a subject, plural as numbers.
9. Tricky Case 8, "who/which" verbs match what they point back to
Sometimes a describing clause uses who or which, and contains its own verb. That verb must match the noun that who/which points back to (the noun it's describing). That noun is called the antecedent (the thing that came before).
Look:
- She is one of the researchers who have published on this. → who points back to researchers (plural) → have. ✓
- She is the only researcher who has covered this. → who points back to researcher (singular) → has. ✓
The difference is subtle but real. In the first, who refers to researchers (she is one of several who have published). In the second, who refers to researcher (she's the only one, singular).
The rule: find what who or which points back to, and match the verb inside the clause to that noun.
Check yourself: Inside a who/which clause, the verb matches the noun that who/which points back to. ...researchers who HAVE published (who = researchers, plural). ...the only researcher who HAS published (who = researcher, singular).
10. Linking back to the big idea
Every one of these tricky cases is really the same skill from Nouns and Countability: The Word That Controls the Sentence, find the real boss (head noun) and match the verb to it, applied to a situation where finding the boss takes extra care:
- In "of" phrases, the boss is the first noun (not the one in the of-phrase).
- In group words, the boss is the group, but you decide if it acts as one or as many.
- In "either…or," the boss is whichever subject is nearest the verb.
- In "a number of / the number of," the boss flips depending on a vs. the.
- In "everyone/each," the boss is the indefinite pronoun (always singular).
- In who/which clauses, the boss is the antecedent.
And notice: the verb you're choosing is almost always a Boot word (is/are/was/were/has/have), so this is the Boot from The Boot: The Most Powerful Tool in This Whole Series in action again. Everything connects.
11. A little practice
Try each yourself first, then check the answers.
Exercise A, Choose the verb (mixed tricky cases)
- The committee (has / have) reached a unanimous decision.
- A number of limitations (was / were) identified.
- Neither the methodology nor the data (was / were) convincing.
- Everyone in the lab (needs / need) to follow the rules.
- The number of participants (is / are) increasing.
- She is one of the scientists who (has / have) worked on this.
Exercise B: Find the boss, choose the verb
For each, name the head noun (boss), then choose is or are.
- The box of old books (is / are) heavy.
- Each of the students (is / are) ready.
- Mathematics (is / are) a hard subject.
- The results of the survey (is / are) clear.
Exercise C, Spot the error (or write "correct")
- Everyone are happy.
- The number of cars are growing.
- A number of people were waiting.
- Physics are interesting.
Answers (try first, then check!)
Exercise A, Choose the verb:
- has (committee = one unit making one decision → singular)
- were (a number of = "several"; boss = limitations, plural → plural)
- was (nearest subject = data, treated as singular → was)
- needs (everyone = always singular)
- is (the number of = the count itself → singular)
- have (who points back to scientists, plural → have)
Exercise B: Find the boss, choose the verb:
- boss = box (singular) → is
- boss = each (always singular) → is
- boss = mathematics (field of study, singular) → is
- boss = results (plural) → are
Exercise C, Spot the error:
- Everyone are happy. → Everyone IS happy. (everyone = singular)
- The number of cars are growing. → The number of cars IS growing. (the number of = singular)
- A number of people were waiting. → correct (a number of = plural)
- Physics are interesting. → Physics IS interesting. (field of study = singular)
How did you do? These cases catch even native speakers in writing, so if you handled them, you're doing genuinely advanced work, built entirely on the simple "find the boss" idea.
12. Recap: the main points
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Through all the tricky cases, the core idea holds: find the real boss (head noun) and match the verb to it.
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Words in between (especially of... phrases) don't change the verb. (The quality of the results IS...)
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Group words (team, committee): singular when acting as one unit, plural when members act separately. Be consistent.
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either…or / neither…nor: the verb matches the NEAREST subject.
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a number of = "several" → plural verb. the number of = "the count" → singular verb.
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everyone, somebody, each, neither, nothing = always singular verb. (Even each of the students IS....)
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none = singular is safest in formal writing.
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-s words that are singular: fields of study (Mathematics is...) and the news. Statistics = singular as a subject, plural as numbers.
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Inside a who/which clause, the verb matches the noun who/which points back to.
13. Onward
That's a real achievement; you've now handled the agreement situations that trip up even advanced learners and many native writers. And you did it all with one simple idea from Nouns and Countability: The Word That Controls the Sentence: find the boss, match the verb. The "tricky cases" were never really different rules; they were just trickier places to find the boss.
This also completes the Core Sentence Mechanics stretch (The Structural Mindset: Training Your Eyes to See the Shape through Subject–Verb Agreement: The Tricky Cases That Catch Everyone). You now understand the structural mindset, the sentence engine, the Boot, nouns and countability, and agreement, the whole working machinery of a basic English sentence.
In Building Bigger "Thing" Teams: The M1 Zone (the Front Words), we begin a new and exciting section: building bigger, richer noun phrases. Remember the second master formula from Why We Learn the Shape of English First, NP = (M1)(M2)(M3) N (M4)(M5)? We finally start unpacking it. We'll begin with "M1": the little words at the very front of a noun phrase, the, a, this, my, some, many, three, and learn exactly how they work and what they signal. It's practical and immediately useful.
That wraps up the first eight lessons, solid work. Next, Building Bigger "Thing" Teams: The M1 Zone (the Front Words) starts expanding the noun phrase. Move on whenever you're ready.