Reglas En Inglés: Comparison

A - Comparison with -er/-est
clean - cleaner - (the) cleanest
We use -er/-est with the following adjectives:
1) Adjectives with one syllable
positive | comparative | superlative |
clean |cleaner | cleanest |
new | newer | newest |
cheap | cheaper | cheapest |
2) Adjectives with two syllables and the following endings:
2 - 1) Adjectives with two syllables, ending in -y
positive |comparative | superlative |
dirty | dirtier | dirtiest |
easy | easier | easiest |
happy | happier | happiest |
pretty | prettier | prettiest |
2 - 2) Adjectives with two syllables, ending in-er
positive | comparative | superlative |
clever | cleverer | cleverest |
2 - 3) Adjectives with two syllables, ending in -le
positive | comparative | superlative |
simple | simpler |simplest |
2 - 4) Adjectives with two syllables, ending in -ow
positive | comparative | superlative |
narrow | narrower | narrowest |

3) Spelling of the adjectives using the endings -er/-estpositive | comparative | superlative | comment |
large | larger | largest | leave out the silent -e |
big | bigger | biggest | Double the consonant after short vowel |
sad | sadder | saddest | |dirty | dirtier | dirtiest | Change -y to -i (consonant before -y) |
shy | shyer | shyest | Here -y is not changed to -i.
(although consonant before -y) |

B - Comparison with more - mostpositive | comparative | superlative |
difficult | more difficult | (the) most difficult |
all adjectives with more than one syllable (except some adjectives with two syllables - see 
2 - 1 to 2 - 4)C - Irregular adjectives
positive | comparative | superlative | comment |
good | better | best |   |
bad | worse | worst |   |
much | more | most | uncountable nouns |
many | more | most |countable nouns |
little | less | least |   |
little | smaller | smallest |   |

D - Special adjectives
Some adjectives have two possible forms of comparison (-er/est and more/most)....