1.1 form comparative and superlativ degrees of adjectives: poor, high, thin, small, clean, bad, comfortable, important, light, buse, young

Poor - poorer - the poorest
high - higher - the highest
thin - thinner - the thinnest
small - smaller - the smallest
clean - cleaner - the cleanest
bad - worse - the worst
comfortable - more comfortable - the most comfortable
important - more important - the most important
light - lighter - the lightest
busy - busier - the busiest
young - younger - the youngest