Second, the lack of systemic functional linguistics
Used since Halliday's point of view there are shortcomings, the first Halliday's theory and method can not determine how to find and indirect speech acts of the session to explain the meaning, and perhaps on the theory itself a place worthy of further scrutiny. And system functions, like many of the concepts in linguistics, the concept of pure reason no objective measure of functional standards, people can not be fully confirmed. Secondly, he only admitted between language forms and language features of non-existence of a complex one to one relationship, but the fact that little attention is on the surface but actually mean another meaning, meaning that the surface of the session and the deep meaning of the language of the session the phenomenon. Again, lack of systemic functional linguistics for the psychological mechanism of the speaker