Many adjectives can have three forms:
Absolute Comparative Superlative
Small smaller smallest
Attractive more attractive most attractive
The comparative form is used when comparing two items; the superlative is used when there are more than two:
She is smaller than her brother. (comparative)
The smallest of the three specialist colleges, it has just over 150 full-time students, of whom about half come from Wales. (superlative)
The superlative is formed in different ways according to the length of the base adjective. If it has one syllable, then the letters -est are added. If the word has three syllables or more then the word most is placed before the adjective: most attractive. Words of two syllables vary: some add -est and some use most. Some even do either, for example clever.
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