Abstract: With the help of corpus,this paper investigates and analyzes the source form,development and evolution process and influencing factors of cross-layer structure “juV_single”,as well as the nature and functions of “juV_single”.The initial structure of cross-layer structure “juV_single” is “ju+NP+V_single”.NP was omitted under the promotion of the principle of language economy and the “appropriate criterion” of discourse communication,the structure becomes “ju+Ø+V_single”.The function of “ju”and “V_single” is suspended under the double thrust of ellipsis and external syntactic environment,then pragmatic demand and pragmatic inference lead to the generation of message function of “juV_single”.Under the action of construction coercion,the “ju” and “V_single” in the construction are weakened and changed their own meaning and usage,which is harmony with construction as a whole.At the same time,lexis coerces the construction in turn,forcing the construction of “juV_single” to have the nature of a verb and part of the syntactic function of “V_single”. “juV_single” has the verbal nature in modern Chinese,and has the functions of evidentiality,topic marking and discourse marking.However,due to the influence of differences and competition of the same kind,the use and development of the internal members of the construction of “juV_single” is not balanced.

Key words: cross-layer structure, juV_single, pragmatic inference, construction coercion, lexical coercion