big tall nice goodlong easyyoung hot bigger biggest taller tallest nicer nicest better best longer longest easier easiestyounger youngest hotter hottestThe dog is bigger than the mouse.The horse is the biggest of all.The boy is younger than the man.The baby is the youngest of the three.bigbiggerbiggestyoung youngeryoungestJimLi LeiTomLi Lei is taller than Tom.Jim is the tallest of all.￥30￥20￥10The yellow coat is cheaper than the purple one.The brown coat is the cheapest of the three.The dog is bigger than the mouseThe boy is younger than the man.Li Lei is taller than Tom.The yellow coat is cheaper than the purple one.A + be + 比较级比较级 + than +B形容词比较级句式的结构：形容词比较级句式的结构：The horse is the biggest of all.The baby is the youngest of the three.The brown coat is the cheapest.Jim is the tallest in our class.主语主语 + be + the + 最高级最高级 + of / in.形容词最高级句式的结构：形容词最高级句式的结构：￥30￥20￥10TomLi LeiJimyoungcheaptallpumpkin南瓜南瓜Why does Lucy want to buy a pumpkin?LucyJim is strong.Li Lei is . Tom is .strongerthe strongestThe blue car is nice.The red car the blue car.(红车比蓝车好看）红车比蓝车好看）The colour car of all.（彩色车最好看）（彩色车最好看）is nicer thanis the nicest