Grammar Rule

Examples

The cat is faster than the mouse, but the cheetah is the fastest.
The dolphin is more intelligent than the dog, but the chimpanzee is the most intelligent.

Remember!

We use comparatives and superlatives to compare things and to say which thing is top in a group. Add ‘-er’ and ‘-est’ for one syllable adjectives. Add ‘-ier’ and ‘-iest’ for two syllable adjectives which end in ‘y’ (and take away the ‘y’). Use ‘more’ and ‘the most’ with other two syllable (or more) adjectives.
one syllable: small – smaller – the smallest
two syllables with ‘y’: happy – happier – the happiest
two+ syllables: beautiful – more beautiful – the most beautiful

Be careful!

The adjectives ‘good’, ‘bad’ and ‘far’ have special forms.
good – better – the best
bad – worse – the worst
far – further – the furthest

We say... We don’t say...

Apples are bigger than grapes. (NOT Apples are more bigger than grapes.)
My father is the tallest in my family. (NOT My father is the most tall in my family.)
This book is more interesting than my homework. (NOT This book is interestinger than my homework.)