We form comparatives by adding -er to the end of an adjective or by putting the word more in front of it.
We form superlatives by adding -est to the end of an adjective and the in front of it or by putting the words the most in front of it.
These are the rules:
- For one syllable adjectives, use -er or the …-est
- For two syllable adjectives use more or the most.
- For two syllable adjectives that end in -y, -er, -le or -ow you can use either form.
- For adjectives with three or more syllables, use more or the most.
Here are some examples:
- I was very cold, but I’m warmer now.
- The blue coat is more expensive than the red coat.
- Which flowers do you think are the nicest?
- Dominic is the most popular boy in school.
Note that in sentences where you mention the thing you are comparing something with, you need to use the word than:
- Susie is taller than me.
- Peter is more sociable than his brother.
Be careful with the common adjectives good, bad and far. They are irregular, and their forms are:
- good > better > best
- bad > worse > worst
- far > further > furthest