U9 - Comparisons and Contrasts
Read the theory:
http://grammar.cz/comparatives_superlatives.html#irregular
http://grammar.cz/comparatives_superlatives.html
Do the exercise:
http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjective_comparison4.htm
http://www.helpforenglish.cz/article/2006090801-stupnovani-pridavnych-jmen
http://www.helpforenglish.cz/article/2009092904-comparison-1
http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_as_as.htm
http://www.learnenglishfeelgood.com/english-comparative-superlative1.html