First, the concept is different: the so-called material composition is relative to the propositional argumentative essay, that is, writing an argumentative essay on the basis of providing materials, which is characterized by requiring the author to write according to the materials. Topic composition is a composition based on the theme of a sentence, not limited to style or subject matter. Its characteristic is to expand the imagination around a material (a trigger point) and expand the thinking space. Second, the role is different: in the traditional material composition, the theme of the composition must be extracted and excavated directly from the material, and the material must be used for argument in writing. The theme of topic composition does not need to be refined from the material, but is triggered from the topic. The function of materials is to clarify the topic and inspire students' writing ideas. As far as the material itself is concerned, it can be written or not. Compared with material composition, topic composition has undergone great changes in proposition form and requirements. Topic composition does not specify the theme clearly, but only requires the theme of the composition to be related to the topic. In fact, the theme composition provides the scope of a theme. The use of materials in topic composition is more flexible and creative than argumentative writing. Different from the composition of materials, cited materials are used as a wedge to draw out arguments. Third, the proposition angle is different. Let's talk about the material composition first. Proposers often provide one or more materials in the topic. On the basis of perceiving and mastering these materials, students choose the best angle, put forward the central argument and then discuss it. Although this requirement is less binding than simple proposition composition, some rules and regulations still bind students' hands and feet. For example, the style is generally written as an argumentative essay, the central argument must be refined from the best angle, the writing must be closely related to the material, and the writing must be linked to real life. This kind of writing does not give students enough space to play freely, which is not conducive to the development of students' creative thinking to a great extent. The material of topic composition is the premise and introduction of composition, the guidance provided by proposer and before writing, and the source of students' thinking. In the process of writing, you can quote materials or not mention them at all. It can be seen that topic composition has more space and freedom for students to play than material composition in terms of expression, material selection, conception and genre. The following are two essay questions for the college entrance examination: a. Read the fable poem "Comment on Birds" and write as required: "The sparrow says that the swallow is a coward who is afraid of the cold/the swallow says that the oriole has beautiful clothes/the oriole says that the lark has a beautiful voice/the lark says that the most unprincipled thing is that the parrot/parrot says that the magpie is born with a slave's face and eyebrows/...................................................... Candidates use this implication to determine the central argument and discuss it, which meets the requirements of this material composition, otherwise it is beside the point. Generally speaking, material composition requires that the theme should be refined from the best angle based on the material itself, the writing center should be determined, and then an argumentative essay should be written in combination with the actual situation. B. Read the following materials and write as required. "Goethe said that I have only worked hard in my life, and my chronology is the best explanation; Kant said that people are constantly doing creative work all their lives, and work is the best way to make people happy; Einstein said that as long as one day you get a reasonable thing to do, your work and life will have a strange color from now on; An ordinary person says that we are doomed to suffer hardships and live a hard life all our lives, but we have to live a wonderful life. " After reading the above materials, you may have a new understanding of "wonderful" Please write an article on the topic of "wonderful", which can clarify your own experiences, experiences and feelings, and also write stories and fables. This topic is a composition on the topic of the material. Candidates only need to write around the topic of "wonderful". They don't have to stick to the material itself, but have their own ideas and styles, which undoubtedly provides candidates with a lot of free space. But the topic composition is not very rigorous in style. Candidates are generally required to write in the style they are best at. Generally, they are required to "write in any style except poetry and drama." Fourth, the thinking of writing is different: the theme of argumentative papers is generally fixed, so generally speaking, to write materials, we must first understand the central meaning of raw materials or the meanings of several aspects contained in the materials. For materials with only one central meaning, we should establish a central point around this central meaning, outline the material at the beginning of the article when writing, quickly cut into the key points and put forward the central point. Then analyze the problem objectively, comprehensively and dialectically in the text, and fully demonstrate it on the basis of using raw materials to analyze and demonstrate. Close to the material at the end, and put forward your own views and hopes. Topic composition does not specify the theme clearly, but only requires the theme of the composition to be related to the topic. When examining the topic, we should accurately grasp the connotation and extension of the topic, clearly define the content and open content, and determine the scope of material selection and the theme to be expressed. In particular, don't let go of "topic elaboration" and don't be too rigid in materials. Understanding and grasping the topic description is more important than learning materials. Because the explanation part can often help candidates better understand the topic and open their minds more effectively. If you pay too much attention to material things, your thinking will be restricted. Because the materials involved are much broader than the materials themselves, the intention to guide candidates' thinking is obvious. In addition, as a hub between materials and themes, its explanation of themes is clear and rich. This avoids the examinee's single understanding of the connotation of the topic. Not only that, but also the organic connection between materials and topics can not be separated from the examination of questions. Fourth, the conceptual skills of topic composition are generally skillfully used in the four steps of introduction-discussion-connection-conclusion. The conception process of topic composition can generally be divided into four steps: (1). Divergent thinking and open thinking; (2) Concentrate on thinking and establish the theme; (3) Choose a suitable style; (4) Choose suitable and fresh materials.