Inglés

As… as: comparaciones de igualdad en inglés

As… as: comparaciones de igualdad en inglés

As… as: Comparaciones de igualdad en inglés

Hasta ahora hemos aprendido a decir que algo es «más… que» (comparativo de superioridad) y «el más…» (superlativo). Pero ¿cómo decimos que dos cosas son iguales? En español usamos «tan… como». En inglés, la estructura equivalente es as + adjetivo + as.

Esta estructura es muy versátil y aparece constantemente en conversaciones cotidianas, escritos formales e incluso en expresiones idiomáticas. Es mucho más fácil que los comparativos porque no hay excepciones ni reglas de ortografía. Se aplica igual a todos los adjetivos, sean cortos o largos.

🎯 En este post aprenderás: La estructura básica as + adjetivo + as, la forma negativa (not as… as / not so… as), comparaciones con sustantivos (as much/many… as), expresiones fijas con as… as (as soon as possible, as long as, as well as), la diferencia con «like», y 5 ejercicios prácticos para dominar las comparaciones de igualdad.

🔍 ¿Qué significa «as… as» y cómo se usa?

📏 Tan… como

ESTRUCTURA: AS + ADJETIVO/ADVERBIO + AS

Juan is as tall as María. (Juan es tan alto como María.)
This book is as interesting as that one. (Este libro es tan interesante como aquel.)
She runs as fast as her brother. (Ella corre tan rápido como su hermano.)

Analogía de la balanza equilibrada: Mientras que el comparativo de superioridad inclina la balanza hacia un lado («más»), la estructura as… as mantiene la balanza perfectamente equilibrada. Los dos platillos pesan exactamente lo mismo: son IGUALES en la cualidad que se describe.

📋 Forma afirmativa: as + adjetivo/adverbio + as

✨ La fórmula de la igualdad

Para decir que dos cosas son iguales en una cualidad, usamos esta estructura. Funciona con TODOS los adjetivos y adverbios, sin excepción.

as + ADJETIVO/ADVERBIO + as + SUSTANTIVO/PRONOMBRE

📝 Ejemplos con adjetivos

Adjetivo Ejemplo Traducción
tall (alto) Maria is as tall as Juan. María es tan alta como Juan.
intelligent She is as intelligent as her sister. Ella es tan inteligente como su hermana.
expensive This phone is as expensive as that one. Este teléfono es tan caro como aquel.
beautiful The sunset is as beautiful as a painting. El atardecer es tan bonito como una pintura.
fast My car is as fast as yours. Mi coche es tan rápido como el tuyo.

📝 Ejemplos con adverbios

Adverbio Ejemplo Traducción
fast (rápido) She runs as fast as her brother. Ella corre tan rápido como su hermano.
slowly (lentamente) He drives as slowly as a tortoise. Él conduce tan lentamente como una tortuga.
well (bien) You speak English as well as a native. Hablas inglés tan bien como un nativo.
carefully She did the job as carefully as possible. Hizo el trabajo con el mayor cuidado posible.

💡 Nota: Después del segundo «as» podemos usar un sustantivo, un pronombre (I, you, he, she, it, we, they) o incluso una frase completa. Ejemplo: «He is as strong as I expected» (Él es tan fuerte como esperaba).

📋 Forma negativa: not as… as / not so… as

❌ No tan… como

Para decir que dos cosas NO son iguales (una es menos que la otra), usamos la forma negativa. Hay dos variantes: not as… as (más común) y not so… as (un poco más formal, más común en inglés británico antiguo).

not as + ADJETIVO + as = no tan… como
not so + ADJETIVO + as = no tan… como (variante formal)

📝 Ejemplos de forma negativa

Ejemplo Traducción
This book is not as interesting as the previous one. Este libro no es tan interesante como el anterior.
I am not as tall as my father. No soy tan alto como mi padre.
She doesn’t sing as well as her sister. Ella no canta tan bien como su hermana.
This restaurant is not as expensive as I thought. Este restaurante no es tan caro como pensaba.
He is not so patient as his mother (formal). No es tan paciente como su madre.

⚠️ Diferencia sutil: «Not as… as» es neutro. «Not so… as» sugiere una comparación negativa implícita (no llega al nivel esperado). En inglés moderno, «not as… as» es siempre correcto y más común.

📊 Comparación: Superioridad vs Igualdad

Es importante no confundir las tres estructuras de comparación:

Tipo Estructura Ejemplo Traducción
Superioridad adjetivo-er / more + adj + than She is taller than me. Ella es más alta que yo.
Igualdad as + adjetivo + as She is as tall as me. Ella es tan alta como yo.
Inferioridad not as + adjetivo + as She is not as tall as me. Ella no es tan alta como yo (es más baja).

💡 Pregunta tipo test: Si dos cosas son iguales, usa «as… as». Si una es más, usa «-er than» o «more than». Si una es menos, usa «not as… as». ¡No las confundas!

📊 Comparaciones con cantidades: as much/many… as

Cuando queremos comparar cantidades (no cualidades), usamos «as much as» (incontable) o «as many as» (contable).

📦 as many as + contables

  • I have as many books as you. (Tengo tantos libros como tú.)
  • She invited as many people as possible. (Invitó a tantas personas como fue posible.)
  • There are as many men as women in the room. (Hay tantos hombres como mujeres en la sala.)

💧 as much as + incontables

  • I have as much money as you. (Tengo tanto dinero como tú.)
  • She drinks as much water as her brother. (Bebe tanta agua como su hermano.)
  • We have as much time as we need. (Tenemos tanto tiempo como necesitamos.)

📚 Expresiones fijas con as… as

El inglés está lleno de expresiones idiomáticas que usan la estructura as… as. Son muy comunes y dan color al idioma.

🌈 Expresiones comunes (similes)

Expresión Significado Ejemplo
as white as snow blanco como la nieve Her dress was as white as snow.
as black as coal negro como el carbón His hair is as black as coal.
as fast as lightning rápido como un rayo He runs as fast as lightning.
as light as a feather ligero como una pluma This box is as light as a feather.
as heavy as lead pesado como el plomo My backpack is as heavy as lead.
as busy as a bee ocupado como una abeja She is as busy as a bee these days.
as clear as crystal claro como el cristal The water is as clear as crystal.
as quiet as a mouse silencioso como un ratón Be as quiet as a mouse.
as strong as an ox fuerte como un buey My grandfather is as strong as an ox.
as cold as ice frío como el hielo Her hands were as cold as ice.

📌 Expresiones útiles para conversación

Expresión Significado Ejemplo
as soon as possible (ASAP) lo antes posible Please reply as soon as possible.
as long as siempre que / mientras / tan largo como You can go out as long as you finish your homework.
as far as I know que yo sepa As far as I know, she is coming.
as well as también / además de She speaks Spanish as well as English.
as much as possible tanto como sea posible Save money as much as possible.
as a result como resultado He didn’t study; as a result, he failed.

🎧 Ejemplos de expresiones fijas en contexto:

  • Please come as soon as possible. We need you here. (Por favor, ven lo antes posible. Te necesitamos aquí.)
  • You can borrow my car as long as you return it by 10 PM. (Puedes tomar prestado mi coche siempre que lo devuelvas antes de las 10 PM.)
  • As far as I know, the meeting is still on for tomorrow. (Que yo sepa, la reunión sigue siendo mañana.)
  • She is a talented singer as well as a great dancer. (Es una cantante talentosa además de una gran bailarina.)

🔍 Diferencia entre «as… as» y «like»

«Like» también se usa para comparar, pero de manera diferente. «Like» compara sustantivos, no adjetivos.

Estructura Uso Ejemplo
as + adjetivo + as Compara cualidades (igualdad) She is as tall as her mother. (Es TAN alta COMO su madre.)
like + sustantivo Compara categorías o apariencia She is like her mother. (Ella es COMO su madre → parecida en personalidad, no necesariamente en altura.)

💡 Regla rápida: Si usas un adjetivo (tall, fast, beautiful), necesitas «as… as». Si usas solo un sustantivo (her mother, my father, a bird), puedes usar «like».

🧪 5 Ejercicios prácticos con as… as

Ejercicio 1: Completa con as… as

Completa las oraciones usando «as + adjetivo + as».

  1. My brother is __________ (tall) me.
  2. This movie is __________ (interesting) the book.
  3. She runs __________ (fast) her friend.
  4. This phone is __________ (expensive) that one.
  5. He speaks English __________ (well) a native speaker.
  6. The weather today is __________ (bad) yesterday.
  7. Her hair is __________ (long) mine.
✅ Ver solución
  1. as tall as
  2. as interesting as
  3. as fast as
  4. as expensive as
  5. as well as
  6. as bad as
  7. as long as

Ejercicio 2: Forma negativa (not as… as)

Reescribe las frases para expresar que NO son iguales.

  1. Maria is tall, but Juan is taller. → Maria __________ Juan.
  2. This book is interesting, but the previous one was more interesting. → This book __________ the previous one.
  3. She sings well, but her sister sings better. → She __________ her sister.
  4. My car is fast, but yours is faster. → My car __________ yours.
  5. The first exam was difficult, but the second was more difficult. → The first exam __________ the second.
✅ Ver solución
  1. Maria is not as tall as Juan.
  2. This book is not as interesting as the previous one.
  3. She does not sing as well as her sister.
  4. My car is not as fast as yours.
  5. The first exam was not as difficult as the second.

Ejercicio 3: Elige la opción correcta (as much as vs as many as)

  1. I have __________ (as much as / as many as) apples as you.
  2. She drinks __________ (as much as / as many as) water as her brother.
  3. There are __________ (as much as / as many as) chairs as people.
  4. He earns __________ (as much as / as many as) money as his wife.
  5. We have __________ (as much as / as many as) time as we need.
  6. She invited __________ (as much as / as many as) friends as possible.
✅ Ver solución
  1. as many as (apples = contable)
  2. as much as (water = incontable)
  3. as many as (chairs = contable)
  4. as much as (money = incontable)
  5. as much as (time = incontable)
  6. as many as (friends = contable)

Ejercicio 4: Traduce al inglés usando as… as

  1. Este edificio es tan antiguo como aquel.
  2. Mi perro no es tan grande como el tuyo.
  3. Ella es tan inteligente como su hermano.
  4. No tengo tanto dinero como tú.
  5. Hay tantas mujeres como hombres en la fiesta.
  6. Por favor, ven lo antes posible.
  7. Puedes quedarte siempre que estés callado.
  8. Que yo sepa, el tren ya ha llegado.
✅ Ver solución
  1. This building is as old as that one.
  2. My dog is not as big as yours.
  3. She is as intelligent as her brother.
  4. I don’t have as much money as you.
  5. There are as many women as men at the party.
  6. Please come as soon as possible.
  7. You can stay as long as you are quiet.
  8. As far as I know, the train has already arrived.

Ejercicio 5: Completa las expresiones fijas

Completa estas expresiones idiomáticas comunes.

  1. as white as __________
  2. as fast as __________
  3. as busy as a __________
  4. as quiet as a __________
  5. as strong as an __________
  6. as light as a __________
  7. as cold as __________
  8. as clear as __________
✅ Ver solución
  1. as white as snow
  2. as fast as lightning
  3. as busy as a bee
  4. as quiet as a mouse
  5. as strong as an ox
  6. as light as a feather
  7. as cold as ice
  8. as clear as crystal

❌ Errores comunes con as… as

Error Ejemplo incorrecto Corrección
Olvidar el segundo «as» She is as tall me. She is as tall as me.
Confundir «as» con «like» She is as tall like me. She is as tall as me.
Usar «than» en lugar de «as» She is as tall than me. She is as tall as me.
Posición incorrecta del adjetivo She is as tall as is me? She is as tall as me.
Confundir «as much» con «as many» I have as much books as you. I have as many books as you.

📊 Resumen visual de la estructura

📐 La fórmula as… as en acción

AFIRMATIVA: [Sujeto] + [verbo] + as + [adjetivo/adverbio] + as + [sustantivo/pronombre]
📌 She is as tall as her brother.

NEGATIVA: [Sujeto] + [verbo] + not as + [adjetivo/adverbio] + as + [sustantivo/pronombre]
📌 She is not as tall as her brother.

CANTIDAD CONTABLE: as many + [sustantivo plural] + as
📌 I have as many books as you.

CANTIDAD INCONTABLE: as much + [sustantivo incontable] + as
📌 I have as much money as you.

📚 Serie completa: Comparativos y superlativos

🏆 Reto de la semana: Durante los próximos 7 días, cada vez que quieras expresar igualdad entre dos cosas, intenta formularlo en inglés usando as… as. En el supermercado: «This apple is as red as that one.» En casa: «My room is as tidy as yours.» En el trabajo: «This task is as important as the previous one.» También intenta incorporar al menos 3 de las expresiones fijas (as soon as possible, as long as, as far as I know). La práctica consciente convertirá esta estructura en un hábito natural.
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Trasteando en la escuela está formado por un grupo de docentes titulados en diversas áreas. Somos amantes del conocimiento y de la enseñanza, tratando de ayudar a los estudiantes y todo aquel que desee aprender. Escribimos sobre materias de escuelas, institutos y universidades. También sobre noticias relacionadas con la enseñanza. Si quieres aprender, síguenos.

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