For seeing the creation of speeches as a way to express messages and speakers state of mind,the specific analysis of the mechanisms of opting for certain elliptical device is conducted in the light of Discourse Principles proposed by Qiu Shude.

cultural difference and rhetorical preference,textual interaction and the sense of audience,and textual or discourse competence and the constitutive principles of textual communication, aiming at contributing to the improvement of the teaching of English writing and the integration of the theories of English writing as well.

This paper, by stressing the communicative role of the text and by studying at length the features, functions and principles of text composition, states that the recognition of the importance of the text is essential for the achievement of good result in teaching writing.

Based on Cognitive Constructivism,this paper proposes a tentative EFL writing model in a linear format: a regular piece of writing usually starts from a casual discourse,develops in imitation of the model essay and arrives at the personalized text particular to the individual writer.

On Pragmatic Principles Under the Influence of Speech Act of Expressiveness;

Its peculiarity wages a war against pragmatic principles.

Cooperative Principle (CP) and Politeness Principle (PP) are not only the main content of pragmatic principles but also the core of Leech s interpersonal rhetoric.