1 Introduction
Foreign language teaching generally refers to the theory and practice of teaching a foreign language.It has close connection with linguistics,psychology,education,philosophy,sociology and other disciplines.Since linguistics and foreign language teaching both study language phenomena on the aspects of theory and practice,the two are much closely related to each other.Linguistics is beneficial to language teaching in two aspects： Firstly,applied linguistics extends theoretical linguistics in the direction of language learning and teaching,so that the teacher is enabled to make better decisions on the goal and content of the teaching.
