Comparisons
English uses comparative and superlative adjective forms to compare people, places, and things. Knowing when to add -er/-est or use more/most is essential for everyday communication.
Three degrees of comparison
Adjectives have three forms: the base (no comparison), the comparative (comparing two things), and the superlative (comparing three or more, identifying the extreme).
| Base | Comparative | Superlative |
|---|---|---|
| tall | taller (than) | the tallest |
| fast | faster (than) | the fastest |
| beautiful | more beautiful (than) | the most beautiful |
| good | better (than) | the best |
| bad | worse (than) | the worst |
| far | farther / further (than) | the farthest / furthest |
When to use -er/-est vs. more/most
| Adjective type | Comparative | Superlative | Examples |
|---|---|---|---|
| 1 syllable | add -er | add -est | old → older → oldest |
| 1 syllable ending in CVC | double + -er | double + -est | big → bigger → biggest |
| 1 syllable ending in -e | add -r | add -st | nice → nicer → nicest |
| 2 syllables ending in -y | change y to -ier | change y to -iest | happy → happier → happiest |
| 2+ syllables | more + adj | most + adj | careful → more careful → most careful |
As … as (equality)
To say two things are equal, use as + adjective + as. The negative is not as … as or not so … as.
She is as tall as her brother.
This film is not as interesting as the last one.
He runs as fast as a professional athlete.
The new phone is just as expensive as the old model.
Comparative structures
| Structure | Meaning | Example |
|---|---|---|
| adj-er than / more adj than | One is more than the other | London is bigger than Edinburgh. |
| much / far + comparative | Large difference | She is much taller than me. |
| a bit / a little + comparative | Small difference | This one is a bit cheaper. |
| the + comparative, the + comparative | One increases with the other | The more you study, the better you get. |
Superlative structures
- Always use the before a superlative: the biggest, the most interesting
- Use in with places and groups: the tallest building in the world; the best player in the team
- Use of with a set: the oldest of the three brothers; the worst of all the options
- Use ever with present perfect: It's the best film I have ever seen.
Never mix -er with more, or -est with most: more taller ✗ → taller ✓ most fastest ✗ → fastest ✓. Choose one form only. Also, always use than after a comparative, not that: bigger than ✓, not bigger that ✗.
Tip: Some 2-syllable adjectives can take either form — clever → cleverer or more clever; simple → simpler or more simple. Both are acceptable. When in doubt with 2-syllable adjectives, more/most is always safe.