good是形容词,修饰名词或代词,在句子中充当定语或表语。如:a good time,The film is good. 而well既可作形容词(表示“身体健康”),充当表语。如:-How are you? -I am well.又如:He looks well.=I am fine.又可作副词,修饰形容词或动词。如:The little boy plays basketball very well.(用作副词,修饰动词play)。