The key principle of lexical a proach is that "language consists of grammaticalized lexis, not lexicalized grammar. " English vocabulary teaching should be based on lexical approach.
词块理论认为“语言是由语法化的词汇，而非词汇化的语法构成的”。
2
The purpose of this thesis is to testify task-based teaching approach is more effective than the traditional PPP(Presentation, Practice and Production)method in grammar teaching in vocational schools.