Subject–verb agreement becomes tricky when a sentence begins with either or neither. These words can point to two choices, but the verb form depends on how the sentence is built, not just on the word itself.
In many cases, the correct verb is singular because either and neither are treated as singular subjects. In other cases, the verb follows the noun phrase closest to it, especially in paired constructions or when the sentence structure changes.
What either and neither do in a sentence
Either and neither are often used to connect two alternatives. They can act as determiners, pronouns, or conjunction-like words, and that flexibility affects agreement.
When they stand alone as subjects, they usually take singular verbs. When they appear in paired structures such as either…or and neither…nor, the verb often agrees with the closer noun.
This is why the same word can seem to follow different rules in different sentences. The key is to identify the grammatical subject before choosing the verb.
Basic rule for singular agreement
When either or neither is the subject, use a singular verb. This is the safest default in formal writing.
Examples: Neither of the answers is correct. Either of the options works for me. In both sentences, the phrase looks plural because it mentions more than one item, but the subject is still treated as singular.
This rule often surprises writers because the noun after of is plural. The verb does not match that noun unless the structure changes the subject relationship.
Using either with or
In an either…or construction, the verb usually agrees with the noun closest to it. That nearby noun controls the verb because it is the last subject in the pair.
Examples: Either the manager or the assistants are responsible. Either the assistants or the manager is responsible. The verb changes because the subject nearest to the verb changes.
This pattern matters most when one noun is singular and the other is plural. It helps to read the sentence from the verb backward and identify which noun is closer.
When both subjects are singular
If both options are singular, use a singular verb. The sentence stays simple because neither subject creates a number conflict.
Example: Either the teacher or the principal is attending the meeting. Both nouns are singular, so is fits naturally.
When both subjects are plural
If both options are plural, use a plural verb. The agreement is straightforward because the nearest subject is also plural.
Example: Either the engineers or the designers are presenting today. The plural noun near the verb determines the form.
When one subject is singular and the other plural
When one subject is singular and the other is plural, proximity becomes important. The verb should match the subject closest to it, even if that means the sentence sounds slightly less balanced.
Example: Either the coach or the players are ready. Example: Either the players or the coach is ready. Both are correct if the intended meaning matches the nearer subject.
Using neither with nor
The same proximity rule applies to neither…nor. The verb agrees with the subject closest to it.
Example: Neither the report nor the charts are complete. Example: Neither the charts nor the report is complete. The nearer noun controls the verb form.
This structure is common in business and academic writing. It lets you connect two negative alternatives without changing the meaning of the sentence.
Choosing the stronger subject
Sometimes the sentence sounds more natural if you place the subject that should control agreement nearest the verb. This is a useful editing move, not a grammar trick.
Example: Neither the proposal nor the revisions are ready sounds smoother if the revisions are the main focus. If the proposal is the main focus, reverse the order.
Either and neither as pronouns
When either and neither stand alone as pronouns, they usually take singular verbs. They refer to one of two things, not both at once.
Examples: Neither is acceptable. Either is fine. These short sentences are easy to use in formal writing and in conversation.
Pronoun use often appears after a question or a comparison. The verb stays singular because the pronoun represents a single choice.
Either and neither with of phrases
In phrases like either of and neither of, the verb is usually singular in standard English. The phrase functions as a singular subject even though the noun after of is plural.
Examples: Neither of the students has arrived. Either of the routes leads to the station. The plural nouns students and routes do not control the verb.
This rule is especially important in academic and professional writing. It prevents a common error where writers choose a plural verb because the noun after of looks plural.
Why the noun after of does not control agreement
The noun after of is part of a prepositional phrase. Prepositional phrases do not usually determine subject–verb agreement.
That is why Neither of the plans are working is usually incorrect in formal English. The better form is Neither of the plans is working.
How clause structure changes agreement
Sometimes the sentence contains a full clause after either or neither. In those cases, you must identify the true subject of the clause before choosing the verb.
Example: Either the interns or the supervisor is handling the issue. The verb belongs to the full subject phrase, not to either alone.
Clause structure also matters when the sentence is inverted or interrupted. A long phrase between the subject and verb can hide the agreement cue, so careful reading is essential.
Interrupting phrases that do not affect agreement
Words and phrases placed between the subject and verb do not change agreement. They may make the sentence longer, but they do not change the subject number.
Example: Neither of the candidates, despite the rumors, is withdrawing. The interruption does not affect the singular verb.
Common mistakes writers make
One frequent mistake is matching the verb to the nearest noun without checking whether that noun is actually the subject. This leads to errors in sentences with either of and neither of.
Another common error is treating either and neither as plural simply because they refer to two items. The grammar does not work that way in standard usage.
A third mistake is mixing up the rules for formal writing and casual speech. Spoken English sometimes tolerates patterns that edited writing does not.
Incorrect and correct examples
Incorrect: Neither of the answers are correct. Correct: Neither of the answers is correct.
Incorrect: Either the phone or the tablets works. Correct: Either the phone or the tablets work.
Incorrect: Neither the books nor the notebook are missing. Correct: Neither the books nor the notebook is missing.
Special cases in formal and informal English
In speech, many native speakers use plural verbs more freely after neither of or either of. In edited writing, singular agreement is usually preferred.
This difference can create confusion for learners. A sentence may sound acceptable in conversation but still be marked wrong in an academic paper or business document.
If you want a safe default, choose singular verbs with either of and neither of. Reserve more flexible patterns for contexts where informal tone is acceptable.
How to handle long noun phrases
Long noun phrases can obscure the real subject. When this happens, strip away modifiers and identify the core noun before deciding on the verb.
Example: Neither of the proposals from the regional offices, which arrived late, is suitable. The core subject is still neither, so the verb remains singular.
This method works well with complex sentences. It reduces the chance of agreeing with a nearby plural noun that is not actually the subject.
Modifier removal test
Try reading the sentence without the extra details. If the core sentence still sounds correct, the agreement is probably right.
For instance, Neither is suitable confirms the singular verb in the longer version. The modifiers do not change the grammar.
Subject–verb agreement in questions
Questions can hide the subject after the verb, which makes agreement harder to spot. The rule still depends on the same subject structure.
Example: Is either of the tickets valid? Example: Are either of the tickets valid? The first is correct in standard usage because either of the tickets is singular.
In questions with either…or and neither…nor, the verb still follows the nearest subject. The question form does not change the agreement rule.
Agreement with singular and plural meaning
Some sentences create a tension between grammatical number and meaning. The phrase may refer to two items, but the grammar remains singular because the construction treats them as alternatives.
Example: Neither of the two finalists has withdrawn. Even though there are two finalists, the sentence points to one at a time in a negative choice structure.
This distinction helps explain why meaning alone is not enough. Grammar depends on how the sentence packages the options.
Editing strategy for real-world writing
When revising a sentence, first locate the subject, then check whether either or neither is acting alone or in a pair. That simple sequence prevents most agreement errors.
Next, look for the closest noun if the sentence uses either…or or neither…nor. The noun nearest the verb usually determines the verb form.
Finally, read the sentence aloud with the verb removed and then with the chosen verb. If the rhythm and number feel off, the subject may be misidentified.
Examples from academic and professional contexts
Academic writing often uses these structures in precise comparisons. Example: Neither the theory nor the data support the claim.
Business writing uses them to describe responsibility or choice. Example: Either the finance team or the legal team is reviewing the contract.
Technical writing also relies on them when listing options. Example: Either of the settings changes the output format. These contexts reward careful agreement because readers expect clarity.
Common patterns worth memorizing
Neither of + plural noun + singular verb is a high-value pattern to remember. It appears often and causes repeated errors.
Either…or and neither…nor usually follow the nearest subject. That pattern is reliable in most standard sentences.
When both subjects are the same number, agreement is easier. When they differ, proximity usually decides the verb.
Practical examples with explanations
Neither of the roads is open. The subject is singular, so is is correct.
Either the director or the assistants are available. The nearer subject is plural, so are fits.
Either the assistants or the director is available. The nearer subject is singular, so is fits.
Neither the employees nor the supervisor was informed. The verb matches the nearest singular subject.
Neither the supervisor nor the employees were informed. The verb changes because the nearest subject is plural.
Why this rule matters for clear writing
Correct agreement makes sentences easier to read. It also signals that the writer understands sentence structure and can handle nuanced grammar.
Mistakes with either and neither stand out because they appear in formal contexts. Readers notice them quickly, especially in reports, essays, and professional emails.
Using the right verb also prevents ambiguity. A sentence with the wrong agreement can briefly make readers question the intended subject.
Quick reference for choosing the verb
If either or neither is alone as the subject, use a singular verb. If the sentence uses either…or or neither…nor, match the verb to the nearest subject.
If the phrase is either of or neither of, use a singular verb in standard writing. If the sentence feels unclear, reduce it to its core subject before deciding.
That approach works across most sentence types. It keeps the grammar consistent without forcing you to memorize many exceptions.