写作是英语语言应用能力的一种综合体现,也是大学英语教学中的重点和难点。克拉申的第二语言习得理论是二语习得的一个重要理论,该理论强调了在语言习得中应重视对学习者的可理解性输入以及降低学习者情感焦虑。本文首先介绍了克拉申的五个假说,然后依次探讨了五个假说对大学英语写作的启示。一、克拉申的第二语言习得理论从20世纪70年代起,克拉申便专注于第二语言习得的研究,经过多年的研究,于80年代初发表其两大专著: Writing is a comprehensive expression of English language ability, but also the focus and difficulty in college English teaching. Krashen’s second language acquisition theory is an important theory of second language acquisition, which emphasizes the importance of inputting comprehensible input into learners and reducing learner anxiety in language acquisition. This article first introduces Krashen’s five hypotheses, and then explores the implications of the five hypotheses on college English writing in turn. First, Krashen’s second language acquisition theory From the 1970s onwards, Krashen will focus on second language acquisition research, after years of research, published in the early 1980s, the two major monographs: