The Variation-analysis And The Grammatical Process Of Prepositions"gei,ti ,wei"

The thesis is made up of five parts:The first part of the thesis is the introduction.It introduced the Research survey and Research results which Academic circle had obtained in this domain. Determined the writing ideas the purpose.The second part on the basis of existing research in modern Chinese scholars on the Chinese common preposition "gei", "ti", "wei" description of the syntactic and semantic features, summarized the use of their own unique, not only between them are discussed can cross the use of local, in those circumstances are not inter changeable, and a special introduction to their respective targets. When Introduce clients and beneficiaries, this three preposition inter changeable. When "gei" introduction to the recipient and facilities actors, introducing the victim, introduce the direction and target articular.The third part introduced the grammatical process of "gei", "ti", "wei", Syntactic position is the basic premise of the grammaticalization.If a verb can Grammar into preposition,this verb must be act as the first verb or the second verb in the liandong sentence.when a verb always act as the first verb or the second verb in the liandong sentence,especially act as the first verb, As the information structure of the arrangement, The verbs are often minor verb, Often expressed with action. Lead to weakening of semantic generalization, After the grammar of meaning, Cause with the diversification, Finally lost the meaning and function of the verb, be marked with the features and functions mediated cited the empty word-a function word.In the forth part, the author has made a specific analysis of the common errors of the three prepositions made by the foreign students form South-Eastern Asia. Conclued the major errors which the foreign students form South-Eastern Asia made. at the same time,aiming some problems in textbooks and teaching methods, this paper presents some suggestions and improvements.The fifth part is the conclusion. This summary outlines some of the basic conclusions drawn and shortcomings.