Prose was a literary genre that described the author's thoughts, feelings, and experiences in a free, undisciplined, and lyrical manner. The origin of prose can be traced back to ancient Greece, and the development of modern prose can be traced back to the 19th century. In the process of development, the content and function of prose had changed a lot. Here are some of the changes: 1. Freedom of Form: The form of prose is very free. It can be expressed in the form of diary, travel notes, novels, poems, etc. This form of freedom allowed the prose to express the author's feelings and thoughts more flexibly. 2. Express thoughts: The main purpose of prose is to express the author's thoughts and feelings, not to describe objective facts. Prose can convey emotions and thoughts by describing the author's inner feelings, opinions, and attitudes. 3. Express emotions: Prose can express the author's emotions, whether positive or negative. This kind of expression makes the prose more personal and emotional. 4. emphasize literariness: With the development of prose, literariness has gradually become an important feature of prose. Prose began to pay more attention to literary rhetoric and language arts to improve the quality and literary value of prose. 5. A wide range of audiences: The scope of the audience of prose gradually expanded from professional. Prose was no longer limited to professionals and literature lovers, but more universal. In the process of development, prose has changed from traditional recording writing to expressive writing, paying more attention to the expression of emotions and thoughts, as well as paying more attention to literariness and the breadth of the audience.