要弄明白形容词和副词的比较级和最高级，最主要的是观察单词结尾的字母、单词的长度（大家一起来数一数到底有几个音节啊~~）。

形容词、副词的比较级和最高级的变化规律如下：①单音节形容词或副词后面直接加-er或-esttall—taller—tallest fast—faster—fastest ②以e结尾的单音节形容词或副词直接加-r或-stlarge—larger—largest nice—nicer—nicest fine-finer-finest

③以-y结尾的形容词或副词，改-y为-i再加-er或-estbusy—busier—busiest early—earlier—earliest 特别地，形容词或副词是重读闭音节时，双写最后的辅音字母，再加-er或-esthot—hotter—hottest big—bigger—biggest ④多音节形容词或副词前面直接加more或most(直观地看，就是那种特别长的不好记忆的单词)delicious—more delicious—most deliciousbeautiful—more beautiful—most beautiful

还有一类是不规则变化的，这个只能死记硬背，没有什么诀窍。good (well)—better—best bad (badly)—worse—worst 形容词、副词的比较级和最高级的句子公式

比较级最高级形容词物体A + am / are / is + 形比 + than + 物体B.I am taller than you.Pasta is more delicious than pizza.物体A + am / are / is + the + 形最高级 + 比较范围（of + 人/物，in + 地方）.I am the tallest in the class.Pasta is the most delicious food of the three.副词物体A + 行为动词 + 副比 + than + 物体B.Cheetahs run faster than goats.He studies better than me.物体A + 行为动词 + 副词最高级 + 比较范围（of + 人/物，in + 地方）. Cheetahs run fastest in the world.He studies best of us.