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- Use comparatives to compare two things and superlatives to compare three or more.
- Short adjectives add -er/-est; longer adjectives use more/most.
- Common irregulars must be memorised: good–better–best, bad–worse–worst.
- Superlatives almost always take the: the tallest, the most interesting.
- Use than after a comparative: taller than me.
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Whenever you say one thing is bigger, faster or more interesting than another, you are using a comparative. When you say something is the biggest, fastest or most interesting of all, you are using a superlative. These two forms are among the first things English learners need, and English builds them in a few predictable ways. This guide covers every rule — short and long adjectives, irregular forms, spelling changes, and the mistakes learners make most.
Comparatives vs Superlatives
The difference is simply how many things you are comparing:
- Comparative — compares two things: This book is longer than that one.
- Superlative — compares three or more, picking out the extreme: This is the longest book on the shelf.
Short Adjectives: -er and -est
One-syllable adjectives (and some two-syllable ones) form the comparative with -er and the superlative with -est.
Regular Short Adjectives
| Adjective | Comparative | Superlative |
|---|---|---|
| tall | taller | the tallest |
| fast | faster | the fastest |
| cheap | cheaper | the cheapest |
| happy | happier | the happiest |
| simple | simpler | the simplest |
Long Adjectives: more and most
Adjectives of two or more syllables (and almost all three-syllable adjectives) use more for the comparative and most for the superlative. The adjective itself does not change.
Regular Long Adjectives
| Adjective | Comparative | Superlative |
|---|---|---|
| careful | more careful | the most careful |
| expensive | more expensive | the most expensive |
| interesting | more interesting | the most interesting |
| beautiful | more beautiful | the most beautiful |
Irregular Forms
A small group of very common adjectives have completely irregular comparatives and superlatives. These must simply be memorised.
Key Irregular Adjectives
| Adjective | Comparative | Superlative |
|---|---|---|
| good | better | the best |
| bad | worse | the worst |
| far | farther / further | the farthest / furthest |
| little | less | the least |
| much / many | more | the most |
Spelling Rules
When adding -er or -est, watch for three spelling changes:
- Final -e: just add -r/-st: large → larger → largest.
- Consonant + y: change y to i: happy → happier → happiest.
- One vowel + one consonant (stressed): double the consonant: big → bigger → biggest; hot → hotter → hottest.
Useful Comparison Structures
Beyond the basic forms, several structures express comparison precisely:
Common Patterns
than after a comparative: She is taller than her brother.
as ... as for equality: He is as tall as his father.
not as ... as for inequality: Today is not as cold as yesterday.
the ... the ... for parallel change: The more you practise, the better you become.
much / far / a bit to grade: This is much cheaper.
Common Mistakes
The classic error is the double comparative: writing more better or most easiest. Choose one method, never both. A second mistake is using a comparative when comparing three or more things ("the taller of the three" should be the tallest). A third is forgetting the before a superlative. Finally, learners sometimes use then instead of than — remember that comparison always uses than.
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