Ressearch On Semantics And Presupposition Of Complex Sentences

This paper starts from the perspective of semantic structure analysis and applies it to the semantic study of complex sentences by combining presuppositional theory with "P,otherwise Q","preferably P,not Q",and "not only not P but Q".Taking complex sentences as an example,we study the relationship between its logical semantic structure and its presupposition,and analyze the complex sentences from the perspective of pre-defined triggers,so that some semantic or syntactic differences can be effectively and reasonably resolved.The three complex sentences chosen in this paper,from the perspective of semantic structure,have the content of the deep structure omitted at the language level,and the differences between the deep semantic structure and the surface semantic structure lead to different semantic or syntactic phenomena.In "p,otherwise q",the deep semantic structure consists of four parts: A1,B1,A2,and B2.The contents of the omitted words are differen,and there are four different semantic relations and preconditions for q and q.Assumptions,semantics and preset diversity further influence the structure type of the sentence surface.The deeper semantic structure of “preferably p,also q” consists of three parts,the selection term p,the disregard item q,and the best choice item R.In the sentence surface structure,the best choice is omitted and the semantic relationship between the passage and the sinuous sentences is better than By default,this paper concludes that the object of the speaker's choice is between "?q" and "q",not the p and q values displayed by the surface of the sentence.The difference between the actual object of choice of the sentence and the choice of the language table is the phenomenon of the hypothesis."Not only not p,but q",through the analysis of the deep semantic structure in the semantic distance,cross-level progressive enhancement,not the progressive relationship between p and q.