This paper starts from the phenomenon of “mismatches” in which nouns and adjectives can also be used with momentum words (originally only with verbs), this paper takes the construction “X+Num+VCL” as the center and combines the basic theory of construction grammar to understand the general characteristics of each construction form, meanwhile, it also understands the semantic relationship between each construction. From the perspective of constructionalization, it studies the phenomenon of matching between form and semantics And the reasons for this phenomenon. Regarding the theory of construction grammar, starting with “constructionalization and constructional changes”, “three factors of construction (schematicity, productivity, compositionality)”, “construction gestalt system” and “inheritance link” involved in construction grammar, it is concluded that “X+Num+VCL” has different forms and meanings in different periods, forming the pairing of form_new-meaning_new, generating new nodes in network links, and the schematicity, productivity and compositionality of the three also showed gradients. According to the characteristics of the “x” component in the construction, we can get the inheritance relationship between them. The construction “V_Action+Num+VCL” is the original construction, It is also a productive construction. The construction “V_Abstract+Num+VCL”, “A+Num+VCL” and “N_{Instrument/Feature}+Num+VCL” all inherit some features of the original construction, The original construction causes the new construction and is called the rationale for the existence of the new construction. In the process of expanding from prototype to non-prototype, there are certain construction factors, which are the principle of maximum expressiveness, the most economical principle, the principle of analogy thinking and analogization, and the principle of suppression. In addition to these four construction factors, cognitive mechanism has also achieved the development of construction.