comparative and superlatives

http://www.slideshare.net/guest1639c2/comparative-and-superlative-adjectives

http://www.tinyteflteacher.co.uk/learning-english/grammar/much-comparatives.html

http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/much-comparatives.html

http://www.perfectyourenglish.com/grammar/modifiers.htm