Objective To evaluate left ventricular systolic function and dyssynchrony in patients with myocardial infarction(MI) by triplane tissue tracking imaging(Triplane-TTI).

So as to tentativelyexplore the ways to combine the three dimensions of grammar in oral language analysis.

It comments mainly from three aspects:(1) the definition of the nature and function of preposition and prepositional phrase;(2) the study of grammarticalization of preposition and the reason for it;(3) the study of preposition used the theory of three dimensions.

On this basis, we analyze the differences among synonyms from the three dimensions :syntactic, semantic and pragmatic.

A Survey of the Research on "Three Levels;

This text regards the grammar theories of three levels as the guideline mainly, combines with meaning according to form, the static behavior combines with dynamic trends, describes and explains the principle and combines them together.

The paper attempts to analyse the classification of Subject - predicate predicate sentence from the angle of syntactics, semantics and pragmatics by the theory known as three levels, and elaborate the explanation of topic accont structure in pragmatics with the perspective of the predecessors and scholars.

Scholars within the circle of Chinese grammarians orientate the theory of three planes differently and understand the relations of the planes differently.

Strictly, this thesis makes a definition of“three planes”, and maintains that the main cause leading to the confusion of both the types and scopes of Clausal predicate is the non-divided categories of components between pragmatics and syntax which represent th.

Based on other linguists study, this thesis has observed and analyzed the "的 " phrase by applying Valance Theory and Three Planes Theory.