【正确答案】正确答案：The goal of immediate constituent analysis is to analyze a linguistic expression into a hierarchically defined series of constituents. It is to break a syntactic unit and to describe these constitutes according to their forms and functions. Verbal structural descriptions, especially when we are dealing with longer syntactic units, such as sentences, can be rather lengthy and can vary in forms and styles. Therefore, linguists developed various ways to represent structural descriptions graphically, depicting constituent structure in a uniform and easily readable manner.