Equality comparison: as ... as and not as ... as
The pattern
Structure: subject + verb + AS + adjective + AS + second thing. The adjective stays in its base form: no -er, no -est, no more. Examples: "My brother is as tall as me." "This exam is as difficult as the last one." For the negative you can say "not as ... as" or "not so ... as": "A whale is not as fast as a cheetah." The order of the two things can flip with the same meaning: "She is as old as Tom" equals "Tom is as old as her."
| Oracion | Qué compara | Resultado |
|---|---|---|
| The red box is as heavy as the blue one. | Peso en igualdad | pesan igual |
| Spanish is not as hard as maths for me. | Dificultad desigual | maths es mas dura |
| This phone is as expensive as that one. | Precio en igualdad | cuestan igual |
Worked example, step by step
Goal: say that two friends run at the same speed. Step 1: pick the adjective: fast. Step 2: put it between as and as: "as fast as". Step 3: add subject and verb: "Ana runs as fast as Luis." To show they differ, make it negative: "Luis does not run as fast as Ana." Notice the adjective never changes: you never write "as faster as".
Practice
Ejemplo resuelto — Which sentence is correct?
El planteamiento
Which sentence is correct?Razonamiento
Option 1 adds -er (wrong); option 2 adds the article the (wrong). Only the plain form fits.Respuesta correcta
A cheetah is as fast as a lion.
Paso 1 de 3
Which sentence is correct?
"This bag is not as heavy as that one" means both bags weigh the same.
Complete: "Gold is expensive silver." (write the two small words that show equality).
Write four sentences about people, places or things you know: two with as ... as (equality) and two with not as ... as (difference). Keep every adjective in its base form.
Se revisa que el adjetivo no lleve -er ni more y que uses las dos estructuras.
Tu texto se guarda sólo en este dispositivo.
Domain check
Can you compare two things in equality?
Aquí se mira lo que ya fuiste acertando. Pulsa «Comprobar» para saber si puedes seguir.
El PDA reporta grados de comparación de igualdad con as…as. ¿Cuál oración indica correctamente que dos lugares comparten una característica?
Comparación de igualdad con la estructura del PDA: My town is quiet your town, so both places share the same characteristic.
El grado de comparación de igualdad con as…as indica que dos personas, lugares, cosas o animales…
La comparación de igualdad con as…as se puede usar con entrevistas, reportajes y fotografías para indicar que dos animales comparten o no características similares.
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