Образуйте ступени сопоставленья от данных имен прилагательных .

Flat - flatter - the flattest
far - farther/further - the farthest/furthest
funny - funnier - the funniest
late - later - the latest
hot - hotter - the hottest
weak - weaker - the weakest
young - younger - the youngest
red - redder - the reddest
early - earlier - the earliest 
favourite - more favourite - the most favourite
little - less - the least
comfortable - more comfortable - the most comfortable
bitter - more bitter - the most bitter
active - more active - the most active