In this thesis, the theoretical base of missing links is discussed in terms of two theories: cognitive economy principle and informativity theory.

Through analysis and interpretation on the nature,cognitive principle,operational models and cognitive motivations of conceptual metonymy,the paper attempts to demonstrate that,as a conceptual mapping in a domain,metonymy is a cognitive process in which one conceptual entity,the vehicle,provides mental access to another conceptual entity,the target,within the same idealized cognitive model.

The distributional pattern of grammatical aspect across lexical aspect and the developmental sequence is believed to be influenced by the similar pattern in the input and semantic prototype,both of which interact with some universal cognitive principles.

The thesis is a cognitive study of the Chinese non-stereotypical VO constructions with the cognitive theories (stcrcotype category theory, metonymy, metaphor, cognitive frames, cognitive principles, construction grammar) in the hope to find the motivations behind the generation and understanding of the constructions.

The impacts of cognitive principles and communicative principles on metonymy should not be ignored when metonymy is defined from the angle of conceptual contiguity.

During this process,economic principle and exterior factors such as network and the public media added fuel to the fire,and pushed the network language forward healthily.

Based on the pioneers researches into the interrogative level,this paper further investigates the meanings of question in particular,and represents its two major components: the interrogative level and the interrogative scope and their source in terms of the economic principle of language,the information content questions and the yes-no answer.

The economic principle of least efforts and the communication principle of dynamic contextual adaptation explain the process of the phenomenons decoding.

Enlightenment to English-learners by Language Economy Principle

After a summary of the conceptual knowledge of nominalization by systemic- functional linguistics, this paper mainly takes the cognitive approaches, illustrating the philosophical ground of nominalization and uses following theories : category、 figure -grounding theory 、iconicity、and economy principle to analyze nominalization in English advertising discourse.

Theoretically it makes it possible that the development of any word sense be accompanied by an enantiosemous(antonymous/complementary/contrastive)sense;however,controlled by the economy principle,only some such senses can fully develop to result in enantiosemous words.