笼养、笼归和笼虚,这三个短语,从外部形式上看,都是“名词+动词”式,但从其内部结构来看,却是三种不同的语法结构。笼养是状谓式偏正结构,笼归是连动结构,笼虚则是主谓结构。其中的“笼”字,一是名词作状语;一是名词活用作动词;一是名词作主语。其实,这三种结构的界限 Caged, caged and caged, these three phrases are all “noun+verb ” from the external form, but from their internal structure, they are three different grammatical structures. Cage culture is a predicate-like predilection structure, a cage is an interlocking structure, and a cage-independence is a subject-predicate structure. One of the “cage” words, first nouns as adverbial; one is the use of nouns as a verb; one is the subject of nouns. In fact, the boundaries of these three structures