语篇是英语教学的基础资源，教材语篇是学习内容的重要部分。《普通高中英语课程标准》指出，教师要研读语篇，把握好教学的核心内容，对教材语篇的深入解读对深度教学的实施尤为重要。本研究以延展认知为理论基础，提出语篇的三个层级：逻辑性、语境性和情境性；教师在语篇解读时需要将知识的逻辑性、语篇的语境性和语言的情境性作为一个有机融合的整体，超越知识表层结构，进入深层结构的教学，把教学引向学生思维和情感的深处。

Discourse is the basic resource of English teaching, and discourses in textbooks are an integral part of students’ learning content. English Curriculum Standards for Senior High Schools states that teachers should probe into the discourses and grasp the core content of teaching. The in-depth interpretation of textbook discourses is particularly important for the implementation of in-depth teaching. Based on extended cognition, this study puts forward three levels of discourse: logical, contextual and situational. Accordingly, when interpreting a discourse, teachers are also required to take the logic of knowledge, the context of the text and the situational nature of the language as an organic whole, go beyond the surface structure of knowledge, enter the teaching of deep structure, and lead the teaching to the depths of students’ thinking and emotion.