This paper is appealing for the focus on pragmatic memes imput,followed by the practice of memes replication in varous communication contexts for the realization of effective communication and best embodiment of illuctionary acts.

Modal adverbs are special grammatical constituents,and are always associated with pragmatic factors.

It studies how the pragmatic factors, such as communicative intention, context, pragmatic presupposition, influence and constrain the choice and use of syntactic structures, and how they cause the unmarked clauses to change into marked ones.

First, we make deep research on the speech act of gratitude in modern Chinese, include its definition, structure patters, strategies types and the effect of pragmatic factors.

Furthermore, this paper analyzes the pragmatic motivation of such markedness, including three aspects:appellativity, topicness, ecomomy.

It holds that RRG is a powerful grammar as it successfully incorporates discourse and pragmatic factors into the syntactic analysis,and it can not only interpret the structural features of hypotaxical languages like English,but is also suitable for the structural.

The present paper offers a tentative analysis of the corresponding relationship between the construction of interrogative sentences and the related pragmatic factors such as uncertainty,expectation,sincerity and politeness in line with the principle of iconicity,so that a complete understanding of the grammatical relation of interrogative sentences can be acquired.