一、一张嘴。课堂是老师的一言堂，从头到尾都是老师讲解，面面俱到，滴水不漏，但却不给学生参与的机会，不让学生发表自己的见解。难以激发学生学习的主动性。二、一个调。语言呆板，平铺直叙，不能抑扬顿挫，不能随教学内容的乐而乐，忧而忧，缺乏激情、感染力。学生听着如 One, one mouth. Classrooms are teachers’ words and they are all explained from the beginning to the end of the teacher. They are all inclusive and do not leak, but they do not give students the opportunity to participate, and they do not allow students to express their opinions. It is difficult to stimulate students’ initiative in learning. Second, a tune. Language is dull, flat and straightforward. It can’t be tamed and frustrated. It can’t be joyful, worrying, lacking passion, and infectious. Students are listening