During studying grammar,generally people pay more attention to grammatical analysis ,it is not easy to find analysis of extra component.this thesis is about extra component mentioned from ninety ,mainly based on traditional outcome,comprehending constitution of extra component.taking advantage of three dimensions theory and analysing in sound and grammatical order ,including language factors and others,in order to know all the factors of effect on extra component and relationship between language factors and others.we apply three dimension theory to explaining and describing text,theorizing and characterizing.we take three ways to collect text.first writing dowm sample mentioned in grammar books.sencond cutting text followed times,analysing different literary works and picking up the obvious sentences.according to action lingutic theory from pragmatic analysing extra component to two types. |