There are two main types of transitional sentences: one is a sentence that transitions from the beginning to the center. Many students do not use "original narrative" in their composition. One of the reasons is that they don't know how to relate the retelling of raw materials to their own will. Match sentences that need context. For example: "... this material can give us a lot of inspiration, but this article just wants to talk about ..." Second, when the content changes in the writing process, we should use transitional sentences. For example, in the Chronicle of Ridge, it is gratifying and sad to appear here, indicating that the content of the article has changed from "happiness" to "sadness".