One of the most common grammar mistakes in English is choosing a singular or plural verb after a subject that looks simple but behaves differently in real use. This error affects everyday speech, academic writing, workplace email, and test performance because English subject-verb agreement depends not only on the noun nearest the verb, but on the true grammatical subject of the sentence. When learners write “The list of items are on the desk” or say “Neither of the answers are correct,” they reveal a pattern I have corrected repeatedly in ESL classes and editing sessions: the verb is being matched to a nearby noun instead of the subject’s number. Understanding when to use a singular verb and when to use a plural verb matters because it improves clarity, credibility, and fluency. It also prevents mistakes that native speakers notice immediately, especially in formal contexts. In this article, singular verb means a verb form used with a singular subject, such as “is,” “has,” or “runs,” while plural verb means a form used with a plural subject, such as “are,” “have,” or “run.” The challenge is that English includes tricky structures like phrases with “of,” compound subjects, indefinite pronouns, and paired conjunctions. Once you learn how these structures work, the choice becomes far more predictable.
Why this mistake happens so often
The most common reason for singular or plural verb errors is interference from nearby words. In real editing work, I often see learners correctly identify the topic of the sentence but still choose the wrong verb because another noun sits closer to it. In “The box of old photos is in the closet,” the subject is “box,” not “photos,” so the verb must be singular. In “The results of the experiment were surprising,” the subject is “results,” so the plural verb is correct even though “experiment” is singular. This mistake is especially common when a prepositional phrase follows the subject. Words such as “of,” “with,” “along with,” “in addition to,” and “as well as” do not usually change the number of the main subject. “The teacher, along with her students, is attending the event” takes a singular verb because “teacher” is still the subject.
Another reason is that spoken English sometimes blurs formal agreement. Native speakers regularly say things like “There’s two reasons” in conversation, even though “There are two reasons” is grammatically standard. Learners hear the informal version and assume the rule is flexible everywhere. It is not. On exams such as IELTS, TOEFL, and Cambridge English tests, subject-verb agreement is assessed directly and indirectly. In business writing, a mismatch can make a sentence look careless. That is why mastering this one point has a disproportionate payoff.
How to identify the true subject before choosing the verb
The fastest reliable method is to strip the sentence down to its core subject and verb. Ignore descriptive phrases for a moment and ask, who or what is doing the action, or who or what is being described? In “A bouquet of roses was delivered this morning,” the core is “bouquet was delivered.” In “Several pages of the report were missing,” the core is “pages were missing.” This habit prevents attraction errors, the technical term for choosing a verb that agrees with a nearby noun instead of the head noun.
Questions help too. If the sentence begins with “there is” or “there are,” the real subject comes after the verb. “There is a problem” is singular because “problem” is singular. “There are several problems” is plural because “problems” is plural. With inverted structures, learners often choose the verb before they have identified the subject. Slow down and locate the noun that controls agreement.
For related trouble spots involving paired structures, readers can also review the main guide on either, neither, and both common ESL mistakes, because those forms frequently affect verb choice in exactly this way.
Common patterns that require a singular verb
Several high-frequency patterns almost always take a singular verb. First, singular countable nouns take singular verbs: “The machine works,” “My friend lives nearby.” Second, uncountable nouns are grammatically singular even when they refer to large amounts: “Information is useful,” “Furniture was expensive,” “Advice helps.” Third, many indefinite pronouns are singular in standard English, including “each,” “everybody,” “everyone,” “someone,” “anyone,” “nobody,” and “either.” You should write “Everybody knows the rule” and “Each of the students has a copy.”
Titles, subjects, and names that look plural may still take singular verbs when treated as one unit. “Mathematics is difficult for some learners.” “The United States is a large country” in most modern usage. Measurements of time, money, and distance often take singular verbs when viewed as a single amount: “Ten dollars is enough,” “Five years is a long time,” “Twenty miles is too far to walk.” In class, I tell learners to ask whether the phrase functions as one block or as separate items. If it is one total amount, a singular verb is usually correct.
Common patterns that require a plural verb
Plural countable nouns take plural verbs: “The files are ready,” “My neighbors work in healthcare.” Some nouns appear only in plural form and therefore require plural verbs, such as “scissors,” “pants,” “glasses,” and “surroundings.” You say “My scissors are on the table,” not “My scissors is.” Collective references can also become plural when the sentence emphasizes individual members acting separately, especially in British English. American English more often treats collective nouns like “team,” “staff,” and “government” as singular when acting as one unit, as in “The team is winning.” British usage may prefer “The team are playing well” when the players are being considered individually.
Compound subjects joined by “and” usually take a plural verb: “Maria and Daniel are presenting today.” However, that rule has exceptions when the two elements refer to one idea, one dish, or one entity: “Mac and cheese is my comfort food.” This is why memorizing isolated rules is less effective than understanding meaning and structure together.
Tricky cases that cause the most confusion
The hardest cases involve words that change according to meaning. “None” can be singular or plural depending on whether the following noun is uncountable or countable and whether the writer emphasizes not one part or not any members. “None of the water is safe” is singular; “None of the tickets were available” is widely accepted. “All,” “some,” “most,” and “half” work similarly: “All of the cake is gone,” but “All of the cookies are gone.”
Fractions and percentages also follow the noun after “of.” “Fifty percent of the work is finished,” but “Fifty percent of the employees are remote.” Amount expressions with “a number of” and “the number of” confuse even advanced learners. “A number of applicants have withdrawn” is plural because it means several. “The number of applicants has increased” is singular because the subject is the number itself.
| Pattern | Correct verb | Example |
|---|---|---|
| The number of + plural noun | Singular | The number of errors is falling. |
| A number of + plural noun | Plural | A number of errors are easy to fix. |
| Each/Every + singular noun | Singular | Every student has a login. |
| Subject + of phrase | Match the head noun | The list of names is updated. |
| Percent/Fraction + of noun | Match the noun after of | Half of the books are missing. |
Either, neither, and other agreement traps
Paired choices create some of the most persistent singular or plural verb mistakes. “Either” and “neither” used alone as pronouns are usually singular in formal English: “Neither is acceptable,” “Either works.” With “either of” or “neither of” plus a plural noun, formal grammar still usually prefers a singular verb: “Neither of the answers is correct.” In conversation, many native speakers say “Neither of the answers are correct,” but that is less appropriate in edited writing.
With “either…or” and “neither…nor,” the verb usually agrees with the subject closest to it. “Either the teachers or the principal is speaking.” “Either the principal or the teachers are speaking.” This proximity rule is standard in many style guides, including usage followed by major dictionaries and grammar references. I advise learners to rewrite awkward sentences instead of relying on proximity in very formal writing. For example, change “Either the manager or the assistants are responsible” to “The manager or the assistants are responsible,” or better, “Responsibility lies with the manager or the assistants,” depending on your intended emphasis.
Practical editing strategies that prevent errors
The best way to catch subject-verb agreement mistakes is to edit in passes. On the first pass, identify every finite verb and underline its subject. On the second, remove interrupting phrases mentally and test whether singular or plural still sounds right. This is the method I use when reviewing student essays and website copy because it finds errors quickly without overthinking style first. Tools like Grammarly and Microsoft Editor can catch many agreement problems, but they miss context-dependent cases such as collective nouns, percentages, and sentences where both singular and plural are possible depending on meaning.
Reading aloud helps because your ear often notices mismatch once the sentence is simplified. Another strong technique is substitution. Replace the subject with “it” or “they.” If “it” fits, you probably need a singular verb; if “they” fits, you probably need a plural verb. For example, “The quality of the ingredients is important” becomes “It is important,” confirming the singular verb. Build a habit of checking agreement in long noun phrases, inverted sentences, and any sentence containing “of,” “either,” “neither,” or “a number of.” Those are the highest-yield targets.
Choosing the correct singular or plural verb is less about memorizing dozens of disconnected rules and more about identifying the true subject, understanding how English treats quantity and grouping, and recognizing a small set of high-risk patterns. If you remember three things, make them these: ignore distracting nearby nouns, match the verb to the head noun or controlling expression, and treat tricky forms like “neither,” percentages, and “the number of” with special care. The practical benefit is immediate. Your sentences become clearer, your formal writing looks more polished, and your spoken English sounds more controlled. Most important, you stop guessing and start applying a method. Review your recent writing today, find three sentences with complex subjects, and check whether the verb truly matches the subject.
Frequently Asked Questions
1. Why is choosing between a singular and plural verb such a common grammar mistake?
This mistake is so common because English subject-verb agreement is not based only on the noun closest to the verb. It depends on the true grammatical subject of the sentence, and that subject is often separated from the verb by extra words, phrases, or structures that distract the writer or speaker. For example, in the sentence “The list of items is on the desk,” the subject is “list,” which is singular. The phrase “of items” may sound important because “items” is plural, but it does not control the verb. That is why “is” is correct, not “are.”
Writers and learners often make this error because English includes many patterns that look plural on the surface but are singular in grammar, and vice versa. Expressions such as “one of,” “each of,” “neither of,” “a number of,” and “the number of” can be especially confusing. In speech, people also tend to choose the verb that sounds most natural in conversation rather than the one that matches the grammatical subject. In fast writing, especially in emails, exams, or timed assignments, this can lead to mistakes that affect clarity and credibility.
The safest approach is to identify the core subject first and ignore interrupting words temporarily. Ask yourself: who or what is actually performing the action or being described? Once you find that subject, match the verb to it. This habit is one of the most effective ways to avoid one of the most common grammar mistakes in English.
2. How do I know whether the verb should agree with the nearest noun or the real subject?
In standard English, the verb should agree with the real subject, not simply the nearest noun. This is an important rule because many sentences place extra information between the subject and the verb. For example, “The box of old photographs was found in the attic” is correct because the subject is “box,” not “photographs.” Even though “photographs” is closer to the verb in sound and position, it is part of a prepositional phrase and does not determine agreement.
A useful strategy is to remove the extra phrase and test the sentence again. “The box was found in the attic” clearly sounds correct. Then you can reinsert the descriptive phrase: “The box of old photographs was found in the attic.” The same method works with examples like “The quality of the products has improved” and “The teacher, along with the students, is attending the event.” In both cases, the singular noun at the center of the sentence controls the verb.
There are some sentence patterns where agreement becomes more complex, especially with compound subjects, indefinite pronouns, or structures using “or” and “nor.” But the general principle remains the same: locate the grammatical subject, then choose the verb that matches it. Relying on the nearest noun often leads to errors because English sentence structure can be deceptive. Careful readers and strong writers train themselves to look past nearby nouns and focus on the actual subject of the sentence.
3. Is “one of the most common mistakes is” correct, or should it be “are”?
“One of the most common mistakes is” is correct when “one” is the subject. This is one of the most frequently misunderstood patterns in English. In the phrase “one of the most common mistakes,” the head word, or true subject, is “one,” which is singular. The phrase “of the most common mistakes” only tells us which “one” we mean. Because “one” is singular, the singular verb “is” is correct.
This same rule appears in many similar sentences. For example, “One of the students was absent,” “One of the best solutions is to revise the sentence,” and “One of the main reasons is poor proofreading” are all correct. Learners sometimes choose “are” because “mistakes,” “students,” “solutions,” and “reasons” are plural nouns. However, those plural words are inside a modifying phrase and do not control the verb.
The confusion becomes even stronger when a relative clause follows, as in “One of the students who are applying for the scholarship is from Brazil.” Here, “is” agrees with “one,” while “are” agrees with “students” inside the relative clause. That mixed pattern can feel awkward at first, but it is grammatically correct. If you remember that “one” is singular, you will avoid a large number of agreement errors built around this very common structure.
4. Why do sentences with “neither,” “either,” “each,” and “every” cause so many agreement problems?
These words cause problems because they often refer to more than one person or thing in meaning, but they are usually treated as singular in grammar. For example, “Each of the answers is important,” “Neither of the options is ideal,” and “Every student has a textbook” follow the traditional rule of singular agreement. Even though “answers,” “options,” and “students” are plural nouns, the controlling words “each,” “neither,” and “every” are singular, so the verb should also be singular.
In modern spoken English, you may hear plural verbs after some of these words, especially with “neither” and “either,” such as “Neither of them are ready.” This usage is common in conversation, but in formal writing, academic work, business communication, and grammar tests, singular agreement is usually the safer and more widely accepted choice: “Neither of them is ready.” If your goal is correctness across all contexts, singular agreement is the best standard to follow.
The key is to distinguish between meaning and grammar. A phrase can involve multiple items but still take a singular verb because the grammatical subject is singular. This is why these expressions regularly confuse learners. If you pause and identify the controlling word rather than the plural noun inside the phrase, the correct verb choice becomes much easier. In editing, these are excellent sentences to check carefully because they are among the most frequent sources of subject-verb agreement errors.
5. What are the best practical tips for avoiding singular-or-plural verb mistakes in writing and speaking?
The most effective tip is to identify the subject before you choose the verb. Do not decide by sound alone. English often places descriptive phrases between the subject and the verb, and those phrases can trick you into matching the verb to the wrong noun. When you see a sentence like “The list of items is on the desk,” mentally reduce it to “The list is on the desk.” That quick test helps you hear the correct agreement more clearly.
Another strong habit is to learn the high-risk patterns that regularly cause errors. Pay special attention to phrases with “one of,” “each of,” “either of,” “neither of,” “the number of,” “a number of,” “along with,” “as well as,” and subjects joined by “or” or “nor.” For example, “The number of applicants is increasing” is singular because “number” is the subject, while “A number of applicants are waiting” is plural because the expression means “many applicants.” These small differences matter, especially in formal writing.
It also helps to read your sentences slowly during revision. Agreement mistakes are easier to catch when you isolate the sentence and check the subject and verb as a pair. In speaking, if a sentence feels complicated, simplify it mentally before finishing it. Over time, repeated exposure to correct patterns builds instinct. Finally, if you are preparing for exams or professional communication, practice with examples that include distracting phrases and tricky pronouns. Subject-verb agreement improves fastest when you train yourself to look for the true subject rather than the nearest noun.
