主要讨论了：一、交际中句子的动态交际“值”，二、交际中句子的“交际焦点”，三、“知人”在交际中的位置和作用，四、交际语言组织和安排的客观依据。平面语言系统的教学能给学生语言使用的知识，交叉网络系统的语言教学主要是给学生语言交际的能力。我们的语言教学要从前者扩充到后者，让学生既具有语言使用知识又具有语言交际能力。 Mainly discusses: First, the communicative “sentence” of the dynamic value, second, the communicative sentence “communicative focus”, three, “knowing” position and role in communication, four, communicative language organization and arrangement of the objective basis . The teaching of plane language system can give students the knowledge of language use. The language teaching of cross-network system mainly gives students the ability of language communication. Our language teaching should be expanded from the former to the latter, so that students have both language use and language communication skills.