Both, Either y Neither: La Regla de Dos
both para hablar de dos cosas juntas, either para elegir una de dos opciones, y neither para decir que ninguna de las dos es verdad.
Grammar Rule in 30 Seconds
Use these words only when talking about exactly two things to show addition, choice, or total rejection.
- Use `both` for two out of two (A + B). Example: 'I like both shirts.'
- Use `either` for one out of two (A or B). Example: 'Either day is fine.'
- Use `neither` for zero out of two (Not A and Not B). Example: 'Neither car works.'
Overview
ambos, cualquiera o ninguno. Sin embargo, en inglés, existe una estructura lógica muy específica llamada The Rule of Two (La Regla de Dos).pareja, el inglés utiliza tres herramientas esenciales: both, either y neither.ninguno para referirnos a cero personas de un grupo de dos, o de un grupo de cien, el inglés reserva neither exclusivamente para el grupo de dos.Both, either y neither actúan como cuantificadores o determinantes que definen la relación entre dos elementos.Both(Inclusión Total): Equivale a nuestroambosolos dos. Su lógica es1 + 1 = 2. Indica que la afirmación se aplica a los dos elementos por igual. Debido a que siempre se refiere a dos cosas juntas, el verbo que lo acompaña siempre debe ir en plural.Both cars are fast.(Ambos coches son rápidos).
Either(Elección o Posibilidad): Equivale acualquiera de los dos
oo el uno o el otro
. Su lógica es1 o 1. Se usa cuando hablamos de una opción entre dos posibilidades. Aquí es donde muchos hispanohablantes se confunden: aunque hay dos opciones,eitherse enfoca en una a la vez, por lo que generalmente requiere un verbo en singular cuando funciona como sujeto.Either day is fine for me.(Cualquier día —de los dos— me va bien).
Neither(Exclusión Total): Equivale aninguno de los dos
oni el uno ni el otro
. Su lógica es0 de 2. Es la versión negativa deboth. Al igual queeither, se enfoca en la negación individual de cada opción, por lo que también prefiere el verbo en singular.Neither movie was interesting.(Ninguna película —de las dos— fue interesante).
Both | Ambos / Los dos | A y B | Plural |Either | Cualquiera de los dos | A o B | Singular |Neither | Ninguno de los dos | Ni A ni B | Singular |Both+ Sustantivo en Plural:Both students passed.(Ambos estudiantes aprobaron).Either+ Sustantivo en Singular:You can park on either side of the street.(Puedes aparcar en cualquier lado de la calle).Neither+ Sustantivo en Singular:Neither candidate is qualified.(Ningún candidato está cualificado).
ofus, them, you) o un sustantivo con un determinante previo (como the, my, these), necesitamos la partícula of. En este patrón, el sustantivo siempre será plural, pero el verbo seguirá las reglas mencionadas anteriormente.Both of+ plural:Both of my brothers live in Madrid.Either of+ plural:Either of these keys will open the door.Neither of+ plural:Neither of them wants to go.(Ojo: en lenguaje coloquial verás a nativos usar el pluralNeither of them want, pero para tus exámenes y un uso profesional, mantén el singularwants).
Both ... and ...:The hotel was both cheap and clean.(El hotel era a la vez barato y limpio).Either ... or ...:We can either go to the cinema or stay at home.(Podemos o ir al cine o quedarnos en casa).Neither ... nor ...:He speaks neither English nor French.(Él no habla ni inglés ni francés).
- Si alguien te pregunta:
¿Quieres té o café?
, puedes responderEither(Cualquiera me va bien) oNeither(Ninguno de los dos). - Para decir
yo tampoco: Si alguien dice "I don't like pizza", tú respondesNeither do IoI don't like it either.
- En el trabajo (Tomando decisiones):
Both proposals are excellent. Si solo puedes elegir una y te da igual cuál, dirás: Either option is fine with me. Si no te gusta ninguna, dirás: Neither plan is good enough.- En la universidad o estudios:
Both authors agree on this point. (Ambos autores están de acuerdo en este punto). O cuando te dan a elegir entre dos fechas para un examen: Either date works for me.- Vida social y viajes:
Both flights are expensive. Si estás buscando hotel y tienes dos opciones: Neither hotel has a pool. (Ninguno de los dos hoteles tiene piscina).- Conversaciones sobre gustos (Netflix/Música):
I like neither horror nor comedy. Es una forma mucho más sofisticada y precisa de hablar que simplemente decir "I don't like them".- 1La Doble Negación (El error #1):
No quiero ninguno. Tenemos dos negaciones: No y ninguno. En inglés, neither ya es negativo por sí mismo. Si dices I don't want neither, estás cometiendo un error grave.- Incorrecto:
I don't want neither. - Correcto:
I want neitheroI don't want either.
Neither es como un imán negativo que no soporta estar cerca de not o don't.*- 1Confundir el número de elementos:
both para tres o más cosas.- Incorrecto:
Both of my three sisters... - Correcto:
All of my three sisters...
all, any o none. Si hay exactamente 2, usa both, either o neither.*- 1El error de
The both:
Los dos o Los ambos (aunque esto último es raro). Muchos estudiantes traducen esto literalmente como The both.- Incorrecto:
The both students are here. - Correcto:
Both students are here.oBoth of the students are here.
- 1Concordancia del verbo con
Neither of:
los dos, tendemos a usar el verbo en plural.- Incorrecto:
Neither of them are coming. - Correcto:
Neither of them is coming.(Piensa que estás diciendoNi el uno ni el otro está viniendo
).
pareja y cuándo saltar a los cuantificadores generales. Mira esta tabla comparativa:Both (Ambos) | Either (Cualquiera de los 2) | Neither (Ninguno de los 2) |All (Todos) | Any (Cualquiera) | None (Ninguno) |Either y Any:I'll take either shirt. Si hay cincuenta camisas en toda la tienda, dices: I'll take any shirt. Usar either cuando hay muchas opciones suena muy extraño para un nativo.Neither y None:Neither key works. Si tienes un manojo de diez llaves y ninguna funciona, dices: None of the keys work.Both y All:Both es para tus dos manos (both hands), all es para todos tus dedos (all fingers).either y neither?í-der (EE-ther) o ái-der (EYE-ther).neither: ní-der o nái-der. La primera es más común en Estados Unidos y la segunda en el Reino Unido, pero ambas son correctas y se entienden en todo el mundo. ¡Elige la que te resulte más cómoda!either en una frase negativa?tampoco. Por ejemplo: "I don't like spinach, and I don't like broccoli either". Es la alternativa perfecta a neither si ya has usado un don't o can't en la frase.neither ... nor muy formal?I don't like A or B, pero es muy común en la escritura, en correos electrónicos de trabajo y en discursos claros. No tengas miedo de usarlo; te hará sonar mucho más educado y preciso.neither para tres cosas por error?desafinado, como una nota musical fuera de lugar. El interlocutor notará que tu dominio de la lógica del inglés aún está en proceso. Por eso, siempre cuenta mentalmente: ¿Son dos? Usa neither. ¿Son más? Usa none.2. Negative Equivalents
| Structure | Equivalent Negative | Example |
|---|---|---|
|
Neither...
|
Not... either
|
I like neither. / I don't like either.
|
|
Neither of...
|
Not... either of
|
Neither of them came. / They didn't either of them come (Rare).
|
Determiner and Pronoun Structures
| Word | Noun Type | Verb Agreement | Example |
|---|---|---|---|
|
Both
|
Plural Noun
|
Plural
|
Both cars are fast.
|
|
Both of
|
the/my + Plural
|
Plural
|
Both of my cars are fast.
|
|
Either
|
Singular Noun
|
Singular
|
Either car is fine.
|
|
Either of
|
the/my + Plural
|
Singular (Formal)
|
Either of the cars is fine.
|
|
Neither
|
Singular Noun
|
Singular
|
Neither car is fast.
|
|
Neither of
|
the/my + Plural
|
Singular (Formal)
|
Neither of the cars is fast.
|
Meanings
These words are used to refer to two people or things. They help clarify if you mean the whole pair, one of the pair, or none of the pair.
Inclusion (Both)
Refers to two things together; the whole pair.
“Both restaurants are very expensive.”
“I have two brothers; both are older than me.”
Choice (Either)
Refers to one or the other of two things; it doesn't matter which.
“You can take either bus; they both go to the center.”
“Either candidate would be a good choice.”
Exclusion (Neither)
Refers to not one and not the other of two things.
“Neither key opened the door.”
“Neither of my parents speaks English.”
Correlative Pairs
Using 'both...and', 'either...or', and 'neither...nor' to connect two parts of a sentence.
“Both the cat and the dog are sleeping.”
“Either you stay or I leave.”
Reference Table
| Palabra | Función | Significado | Concordancia Verbal | Conjunción |
|---|---|---|---|---|
|
Both
|
Determinante/Pronombre/Conjunción
|
El primero Y el segundo
|
Plural (ej., `are`, `have`)
|
...and...
|
|
Either
|
Determinante/Pronombre/Conjunción
|
El primero O el segundo
|
Singular (ej., `is`, `has`)
|
...or...
|
|
Neither
|
Determinante/Pronombre/Conjunción
|
NI el primero NI el segundo
|
Singular (ej., `is`, `has`)
|
...nor...
|
|
Both of
|
Pronombre (con objeto plural)
|
Dos de dos
|
Plural
|
N/A
|
|
Either of
|
Pronombre (con objeto plural)
|
Uno de dos
|
Singular
|
N/A
|
|
Neither of
|
Pronombre (con objeto plural)
|
Cero de dos
|
Singular
|
N/A
|
Espectro de formalidad
Neither option is acceptable to me. (Declining two suggestions)
I don't like either of them. (Declining two suggestions)
Neither for me, thanks. (Declining two suggestions)
Nah, neither's any good. (Declining two suggestions)
La Regla de Dos: Both, Either, Neither
Both
- Este Y Aquel Ambas opciones son verdaderas/elegidas.
- Verbo Plural Siempre lleva un verbo plural (ej., 'are', 'have').
- Both...and... Par de conjunciones.
Either
- Este O Aquel Elección entre dos, o uno de dos es verdadero.
- Verbo Singular Generalmente lleva un verbo singular (ej., 'is', 'has').
- Either...or... Par de conjunciones.
Neither
- NI Este NI Aquel Cero de las dos opciones son verdaderas/elegidas.
- Verbo Singular Generalmente lleva un verbo singular (ej., 'is', 'has').
- Neither...nor... Par de conjunciones.
Comparando 'Both', 'Either', 'Neither'
Eligiendo entre Both, Either, Neither
¿Estás hablando de exactamente DOS elementos/personas/opciones?
¿Quieres decir 'este Y aquel' (ambos son verdaderos/elegidos)?
¿Quieres decir 'este O aquel' (una elección, o uno es verdadero)?
¿Quieres decir 'NI este NI aquel' (cero son verdaderos/elegidos)?
Frases Comunes con Both, Either, Neither
Positivo y Dual
- • Both of us
- • Both sides
- • Both...and...
Elección y Alternativa
- • Either way
- • Either of them
- • Either...or...
Negativo y Exclusión
- • Neither of us
- • Neither here nor there
- • Neither...nor...
Ejemplos por nivel
I like both dogs.
I like both dogs.
Either is fine.
Either is fine.
Neither of them is here.
Neither of them is here.
Both my hands are cold.
Both my hands are cold.
Neither of the movies was interesting.
Neither of the movies was interesting.
You can have either tea or coffee.
You can have either tea or coffee.
Both of my parents are teachers.
Both of my parents are teachers.
I don't like either of these shirts.
I don't like either of these shirts.
Neither the manager nor the assistant was available.
Neither the manager nor the assistant was available.
Both the price and the quality are important.
Both the price and the quality are important.
Either you finish your homework or you can't go out.
Either you finish your homework or you can't go out.
I've lived in both London and New York.
I've lived in both London and New York.
Neither of the proposed solutions seems viable at this stage.
Neither of the proposed solutions seems viable at this stage.
The results were both surprising and disappointing.
The results were both surprising and disappointing.
Either the battery is dead or the motor is broken.
Either the battery is dead or the motor is broken.
I found neither of the books particularly helpful.
I found neither of the books particularly helpful.
Neither did she acknowledge her mistake, nor did she apologize.
Neither did she acknowledge her mistake, nor did she apologize.
The policy was both ambitious in scope and rigorous in execution.
The policy was both ambitious in scope and rigorous in execution.
It was a situation where either choice would lead to disaster.
It was a situation where either choice would lead to disaster.
Neither of the witnesses could provide a definitive identification.
Neither of the witnesses could provide a definitive identification.
The duality of the soul is a concept that is both ancient and enduring.
The duality of the soul is a concept that is both ancient and enduring.
Neither the inherent complexity of the task nor the looming deadline deterred him.
Neither the inherent complexity of the task nor the looming deadline deterred him.
One might argue that either interpretation is equally valid given the text's ambiguity.
One might argue that either interpretation is equally valid given the text's ambiguity.
The treaty was neither a total success nor an absolute failure, but a pragmatic compromise.
The treaty was neither a total success nor an absolute failure, but a pragmatic compromise.
Fácil de confundir
Learners use 'neither' for groups of three or more.
Learners use 'either' when there are many options.
Learners use 'all' for pairs.
Errores comunes
I have three brothers, both are tall.
I have three brothers, all are tall.
I don't want neither.
I want neither / I don't want either.
Both of book are good.
Both books are good.
Either of the book is fine.
Either of the books is fine.
Neither of my parents are here.
Neither of my parents is here.
Either you come or nor I go.
Either you come or I go.
I like both of them shirts.
I like both of those shirts.
Neither the teacher nor the students is happy.
Neither the teacher nor the students are happy.
Neither he spoke nor he moved.
Neither did he speak nor did he move.
Patrones de oraciones
Both ___ and ___ are ___.
Neither of the ___ is ___.
You can either ___ or ___.
Neither ___ nor ___ ___.
Real World Usage
I'll have both the soup and the salad, please.
I am comfortable working both independently and in a team.
Either time works for me! See ya.
Neither the mouse nor the keyboard is responding.
Neither of those flights has a window seat available.
Both of these dresses are on sale.
¡Recuerda la 'Regla de Dos'!
Both, either y neither son solo para situaciones con DOS cosas, personas u opciones. Si hablas de tres o más, ¡usa all, any o none en su lugar! I like both cats and dogs.
¡Ojo con tus conjunciones!
both...and, either...or, neither...nor. ¡Mezclarlas es un error común! Piensa en ellas como un equipo inseparable. You can either call or text.
Atajo para la concordancia verbal
either...or y neither...nor, el verbo siempre concuerda con el sustantivo MÁS CERCANO. ¡Este truco te salva de dilemas de singular/plural! Neither John nor Mary is here.
Flexibilidad de pronunciación
either y neither. ¡Ambas pronunciaciones ('eye-ther/nigh-ther' y 'ee-ther/nee-ther') son totalmente válidas y entendidas en países de habla inglesa! Neither pronunciation is wrong.
El negativo con 'Both'
si quieres decir que no te gusta ninguno. Es más claro y natural decirI like neither of them
o I don't like either of them." Smart Tips
Always check if you can use 'either' instead of 'any' to sound more precise.
Stick to the singular verb for 'neither of' and 'either of'.
Use 'neither' for negative agreement and 'too' for affirmative agreement.
Remember that 'both of' requires 'the', 'my', 'these', etc., but 'both' alone does not.
Pronunciación
The 'Either' Split
There are two correct ways to say 'either' and 'neither'. One starts with an 'EE' sound, the other with an 'EYE' sound.
Choice Intonation
Either tea ↗ or coffee ↘?
Rising intonation on the first option, falling on the second to show a complete list of choices.
Memorízalo
Mnemotecnia
BEN: Both (Every one), Either (Either one), Neither (No one).
Asociación visual
Imagine a fork in the road with two paths. Both = you take both (impossible but helpful!), Either = you pick one, Neither = you turn around and go home.
Rhyme
Both is two, Either is one, Neither is zero and then we are done!
Story
Two friends, Ben and Jerry, went to a shop. Both wanted ice cream. Either chocolate or vanilla was fine for Ben. But Jerry had no money, so neither flavor was possible for him.
Word Web
Desafío
Look at two objects on your desk. Say one sentence using 'both', one using 'either', and one using 'neither' about them.
Notas culturales
In the UK, 'EYE-ther' is slightly more common in formal settings, while 'EE-ther' is very common in the US, though both are used in both places.
Saying 'Either is fine' is a very common way to be polite in English-speaking cultures, as it shows you are flexible and easy to please.
In legal documents, 'neither...nor' is used strictly to ensure there is no ambiguity about exclusions.
From Old English 'ba' (both) and 'ægther' (either).
Inicios de conversación
Do you prefer tea or coffee?
Which of these two cities would you rather visit: Tokyo or Paris?
Have you ever had a situation where neither of your choices was good?
In your opinion, is it better to have both a high salary and no free time, or a low salary and lots of free time?
Temas para diario
Errores comunes
Test Yourself
My parents are ___ very supportive of my career.
Both se usa porque la oración implica que 'mis padres' (dos personas) *cada uno* apoya.Find and fix the mistake:
Neither of the two books are interesting.
Neither (como pronombre) lleva un verbo singular. Por lo tanto, is es correcto.Choose the correct sentence:
Either se empareja correctamente con or para presentar dos opciones.Translate into English: 'No me gusta ni el café ni el té.'
Answer starts with: ["I...
Neither...nor es la traducción más directa para 'ni...ni'. También puedes usar "I don't like...or..." para un significado similar.Score: /4
Ejercicios de practica
8 exercisesI have two sisters. ___ of them are doctors.
I don't like ___ of these two paintings.
Find and fix the mistake:
Neither of the cars are working.
1. Both... 2. Either... 3. Neither...
Tom isn't here and Sarah isn't here.
Either the students or the teacher ___ responsible.
You can have ___ the red one or the blue one, but not both.
I have three friends...
Score: /8
Practice Bank
13 exercisesYou can take ___ the bus or the train to get there.
She can speak neither English or Spanish.
Choose the correct sentence:
Translate: 'Ambos coches son rojos.'
Arrange these words into a sentence:
Match the sentence parts:
I have two sisters, and ___ of them live in London.
Either of the two solutions are viable.
Which sentence is correct?
Translate: '¿Quieres té o café? Cualquiera de los dos está bien.'
Arrange these words into a sentence:
We visited two museums, and ___ of them had interesting exhibits.
Neither my friends or my brother are coming to the concert.
Score: /13
Preguntas frecuentes (8)
No, `both` is strictly for two things. For three or more, use `all`.
In formal writing, use `is` (singular). In casual conversation, `are` (plural) is very common and accepted.
Use `either` for a choice between 2 things. Use `any` for a choice between 3 or more things.
Yes! For example: `Neither of us wanted to go.` Just remember not to use a negative verb like `didn't` with it.
Both `EE-ther` and `EYE-ther` are correct. Pick one and be consistent, or use whichever sounds more natural in the moment!
It is a short way to agree with a negative statement. If someone says 'I don't like spinach,' you say `Me neither`.
Use `nor` only when you have already used `neither` earlier in the sentence (e.g., `Neither A nor B`).
No. You can say `both books` or `both of the books`. However, with pronouns, you MUST use 'of': `both of them`.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
ambos / tampoco / o...o
Spanish doesn't have a single word that functions exactly like the determiner 'neither' in 'Neither book is good'.
les deux / l'un ou l'autre / ni...ni
French requires 'ne' with 'ni...ni', whereas English 'neither' is used with an affirmative verb.
beide / entweder...oder / weder...noch
German 'beide' can sometimes be used where English would prefer 'the two'.
両方 (ryouhou) / どちらか (dochira ka)
Japanese grammar doesn't distinguish as strictly between 2 and 3+ in its basic quantifiers.
كلاهما (kilahuma)
The dual form is built into the nouns and verbs themselves in Arabic.
两个都 (liǎng gè dōu)
Chinese lacks specific binary-only words like 'either' and 'neither'.
Learning Path
Prerequisites
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