二者作“害怕”之义时,可互换,如: I'm afraid/ (scared) of dogs.我害怕狗. 但scare多用“恐吓”“惊吓”“惊恐”解. 如:The dog scared the thief away.那狗把贼吓得要死. be scared to death 吓得要死 The house scares easily.马易受惊. 而afraid是形容词,常作表语,“担心的”“害怕的”“恐怕”. I'm afraid I'm late.恐怕我晚了吧. He was afraid that he would fail.他担心他会失败.