The four negative sentence patterns emphasize that something with such a clear signal should not be judged wrong, but she made a wrong judgment, highlighting her loneliness, loneliness and anxiety of standing alone in the empty window. As a result, the mind is difficult to calm down, the mood is confused, and there is even a suspicion that the grass and trees are in danger, and the illness is urgent and the doctor is rushed... However, the author uses side descriptions to highlight it.