A1 English: How to Compare Things with Comparative Adjectives — A1 English grammar lesson by Langcom

A1 English: How to Compare Things with Comparative Adjectives

Raúl Maguiña

Fundador de Langcom | Examinador de Cambridge y del SIELE

septiembre 22, 2026

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To compare two things in English, we use comparative adjectives. These special words help us say that one thing has more of a quality than another. For example, if you have two apples, one might be bigger than the other. We change the adjective to show this comparison. For short adjectives, we usually add -er to the end, like small se convierte en smaller. For longer adjectives, we put the word more before the adjective, such as beautiful se convierte en more beautiful. Remember to use than after the comparative adjective when you name the two things you are comparing. This is a basic but very important part of English grammar for everyday conversations.

What Are Comparative Adjectives?

Comparative adjectives help us compare two nouns (people, places, things, ideas). They show which of the two has a certain quality to a greater degree.

Think about two cars. One car might be faster than the other. Or one book might be more interesting than another book.

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How Do We Form Comparative Adjectives?

We change the adjective’s form to make it comparative. There are two main rules:

  • For most short adjectives (1 or 2 syllables), we add -er.
  • For most long adjectives (3 or more syllables), we add more before the adjective.

Short Adjectives: Add -er

If an adjective is short, usually one or two syllables, we add -er to the end.

  • oldolder
  • fastfaster
  • nicenicer (if it ends in ‘e’, just add ‘r’)

Long Adjectives: Use “more”

If an adjective is long, usually three or more syllables, we put the word more before it.

  • beautifulmore beautiful
  • expensivemore expensive
  • importantmore important

Using “than” with Comparatives

When you compare two specific things, you almost always use the word than after the comparative adjective.

It tells us what the first thing is being compared to.

  • My car is faster than your car.
  • This book is more interesting than that movie.

Special Spelling Rules

Sometimes, we need to change the spelling of an adjective before adding -er.

  • If an adjective ends in -y, change y a i and then add -er: happyhappier, noisynoisier.
  • If a short adjective ends in a consonant-vowel-consonant pattern, we often double the last consonant before adding -er: bigbigger, hothotter.

What About Superlative Adjectives?

When you compare three or more things and want to say which one has the most of a quality, you use a superlative adjective.

Para superlatives, we usually add -est to short adjectives (e.g., oldest, biggest) and use the most for long adjectives (e.g., the most beautiful).

Remember to use the before the superlative adjective.

Ejemplo: Lisa is small. Lulu is bigger than Lisa. But Lenny is the biggest!

Common Adjectives: Comparative and Superlative Forms
Adjective Comparative Superlative
old older oldest
big bigger biggest
nice nicer nicest
happy happier happiest
expensive more expensive most expensive
beautiful more beautiful most beautiful

Ejemplos

  • My new phone is faster than my old one.
  • This book is more interesting than that movie.
  • The mountain is higher than the hill.
  • Learning English is easier with Langcom.
  • Cities are often noisier than the countryside.
  • Today’s weather is hotter than yesterday’s.

Práctica

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Errores habituales de los hispanohablantes

Los hispanohablantes a veces cometen estos errores:

  • Using “more” with short adjectives: In Spanish, you often use “más” for all comparisons. In English, remember to use -er for short adjectives.
  • Incorrecto: My house is more big than yours.

  • Correcto: My house is bigger than yours.

  • Forgetting “than”: When comparing two specific things, you need than.
  • Incorrecto: She is taller him.

  • Correcto: She is taller than him.

Preguntas más frecuentes

What is the main difference between comparative and superlative adjectives?

Comparative adjectives compare two things (e.g., taller). Superlative adjectives compare three or more things and show which one has the most of a quality (e.g., the tallest).

Do all adjectives follow the -er / more rule?

Most do! But there are a few irregular ones, like goodbetter, y badworse. You will learn these as you continue studying English.

When do I use “the” with comparative adjectives?

You usually don’t use the directly before a comparative adjective when comparing two things (e.g., He is taller than me, no the taller). Utilizamos the con superlative adjectives (e.no-translation>He is the tallest).

Lecciones relacionadas

Sobre el autor: Raúl Maguiña

Raúl Maguiña es el director de la Asociación Educativa Langcom, un centro autorizado de preparación para el examen Cambridge English en EE.UU.. Con más de una década de experiencia en la enseñanza de idiomas y la certificación internacional, ha ayudado a miles de estudiantes, profesores e instituciones educativas de 25 países a conseguir las certificaciones de inglés de Cambridge, IELTS, TOEFL y Michigan.

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