Songs are not always composed of simple sentence structure or grammar. For instance, the following song Promises Don’t Come Easy serves as a paragon for teaching the subjunctive mood, one of the most difficult and confusing grammatical points for students in learning English. For instance, “I should have known all along”, but “I”, in the lyrics, actually didn’t realize at the beginning that there was something wrong in his or her love relationship. This part presents students with a vivid picture of the inner world of a person in love, in which they can easily capture the mood and content the song writer intends to convey, thereby comprehending and absorbing the grammatical point of subjunctive mood unconsciously.