a few a bit一点都不一样。前者修饰可数名词复数，后者修饰形容词或副词。例如： a few people， a few students. a bit cold， a bit fat. 相关容易混的词还有：a bit of wood=a little wood修饰不可数名词， a little cold=a bit cold.修饰形容词副词。 a little boy 类似于a small boy.
