Comparatives and superlatives are used to compare people, things, or ideas in English, and they follow clear rules. Whether you are saying that London is bigger than Bristol, or that Mount Everest is the highest mountain on Earth, you are using this grammar structure. Understanding when to add -er and -est, when to use more and most, and how to handle irregular adjectives will help you communicate comparisons accurately at every level from A1 upwards.
What Are Comparatives and Superlatives?
A comparative adjective compares two things and is followed by than: This bag is heavier than that one. A superlative adjective identifies the extreme member of a group of three or more and is preceded by the: This is the heaviest bag of all. The choice between a short-form ending (-er / -est) and a long-form structure (more / most) depends on the number of syllables in the adjective.
Forming Comparatives and Superlatives
Short adjectives (one syllable)
Add -er for the comparative and -est for the superlative. If the adjective ends in a single vowel + consonant, double the final consonant before the ending.
- tall → taller → the tallest
- fast → faster → the fastest
- big → bigger → the biggest (double consonant)
- hot → hotter → the hottest (double consonant)
Adjectives ending in -e
Simply add -r or -st rather than the full ending.
- large → larger → the largest
- nice → nicer → the nicest
Two-syllable adjectives ending in -y
Change the -y to -i, then add -er or -est.
- happy → happier → the happiest
- easy → easier → the easiest
- busy → busier → the busiest
Long adjectives (two or more syllables)
Use more before the adjective for the comparative and the most for the superlative. Never combine more with -er or most with -est.
- interesting → more interesting → the most interesting
- expensive → more expensive → the most expensive
- difficult → more difficult → the most difficult
Irregular Forms
A small number of very common adjectives have irregular comparative and superlative forms that must be learnt individually. These irregulars appear constantly in everyday English, so they are worth memorising early.
- good → better → the best
- bad → worse → the worst
- far → further / farther → the furthest / farthest
- little → less → the least
- many / much → more → the most
Using than and the
Comparatives are typically followed by than when you name the second item being compared: Summer is hotter than winter. Superlatives are preceded by the because they refer to one unique extreme within a defined group: July is the hottest month of the year. A common error at A2 level is omitting than or the: always check that both are present in the correct position.
What You'll Learn
- How to form comparative and superlative adjectives using -er / -est and more / most depending on syllable count.
- Spelling rules for short adjectives, including doubling the final consonant and changing -y to -i.
- The irregular forms of good, bad, far, little and many / much and how to use them correctly.
- When to use than after a comparative and the before a superlative in a sentence.
Practice Exercises
Use the exercises below to build accuracy and confidence with comparative and superlative adjectives. Each format tests a different aspect of the grammar.
Also related: English Grammar Exercises Online — a guide to practising all areas of English grammar with interactive tools.
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Frequently Asked Questions
What is the difference between a comparative and a superlative adjective?
A comparative adjective compares exactly two things and is followed by than: This route is shorter than the other one. A superlative adjective identifies the extreme member within a group of three or more and is preceded by the: This is the shortest route of all three options. If you are comparing only two items, use the comparative. If you are ranking one item above or below all others in a larger group, use the superlative.
When do I add -er and -est rather than using more and most?
Use -er and -est with one-syllable adjectives (tall, fast, warm) and with two-syllable adjectives ending in -y (happy, easy, noisy). Use more and most with adjectives of two syllables that do not end in -y (modern, quiet, common) and with all adjectives of three or more syllables (interesting, comfortable, expensive). Never combine the two: more taller and the most tallest are both incorrect.
Do I always need than after a comparative adjective?
You need than only when you name the second item being compared: She is taller than her sister. If the second item is clear from context or left unstated, than can be omitted: I need a bigger bag (implying bigger than the one I have). However, if you introduce a second noun or pronoun, than is always required. Omitting than when the second term is present is one of the most common comparative errors.
Why do some short adjectives double the final consonant?
Consonant doubling preserves the short vowel sound of the original adjective. The rule applies when an adjective ends in a single vowel followed by a single consonant: big becomes bigger (not biger, which would suggest a long i sound), hot becomes hotter, thin becomes thinner. Adjectives ending in two consonants (fast, cold) or a vowel + w/y (slow, grey) do not double: faster, colder, slower.
What are the irregular comparative and superlative forms I must learn?
The most important irregular forms are: good — better — the best; bad — worse — the worst; far — further/farther — the furthest/farthest; little — less — the least; many/much — more — the most. These six base adjectives are extremely common, so their irregular forms appear constantly in spoken and written English. Learning them as fixed pairs (rather than trying to apply rules) is the most effective approach.
Should I use further or farther for physical distance?
In British English, further is used far more commonly than farther for both physical distance and figurative meanings: The station is further away than I thought; We need to discuss this further. Farther is also correct for physical distance and is more common in American English, but further is always acceptable in both contexts. In British English, farther is rarely used and further is the safe default choice.
Can superlatives be used without the?
In most cases, the is required before a superlative: She is the tallest student in the class. However, the can be omitted in a small number of fixed expressions, particularly after a possessive: This is her best work yet; He put his best foot forward. The article is also sometimes dropped in informal speech. In academic writing, formal writing, and standard usage, always include the before a superlative unless a possessive adjective (my, her, its) already precedes the noun.
How do I spell the comparative and superlative of adjectives ending in -y?
When an adjective ends in a consonant followed by -y, change the -y to -i before adding -er or -est: happy — happier — the happiest; easy — easier — the easiest; heavy — heavier — the heaviest; busy — busier — the busiest; early — earlier — the earliest. This spelling change ensures the word is easy to pronounce. Adjectives ending in a vowel + -y, such as grey, simply add -er and -est: greyer, the greyest.
What is the structure as...as and how does it relate to comparatives?
The structure as + adjective + as is used to say two things are equal: My bag is as heavy as yours. The negative not as...as (or not so...as) shows that one thing is less than another: This exercise is not as difficult as the last one. This structure uses the base form of the adjective — never the comparative form. It is a useful alternative to comparatives when you want to express similarity or a lesser degree rather than a greater one.
What are common mistakes with comparatives and superlatives?
The most frequent errors are: (1) double comparative or superlative — more taller, the most biggest (use one form only); (2) missing than after the comparative when the second item is named — She is taller her brother (should be taller than); (3) missing the before the superlative — He is best student (should be the best); (4) forgetting spelling rules — biger instead of bigger, happyest instead of happiest; (5) using a comparative instead of a superlative for a group of three or more — She is the taller of the three (should be the tallest).