This paper investigates the diachronical word order distribution of “V-Lai+NPth” construction and showed its syntactic structures are realized differently depending several ‘event HEAD’s. On chapter 2, we show the distribution of word order VNLai & VLaiN based on typical literatures over Chinese history and verify that their prevailing period are quite remote each other. On chapter 3, we argue that the syntactic position of Lai of VNLai is vP adjunct and its proto-category is preposition phrase whose argument “speaker” got implicit. We also discussed and suggested the syntactic structure of VNLai. On chapter 4, we introduce the concept of “semantic effect” in Minimalist Syntax and “event HEAD” in Generative Lexicon Theory. we showed VLaiN is different from VLaiN in event HEAD which causes various semantic effects(‘process/result’ and ‘result’). On chapter 5, we argue that Lai of VLaiN, as a word, is merged with V firstly and the merge results in verb-head structure. Furthermore, we presume that another ‘process’- HEADed order exists and several event HEADs are progressively realized into the variation of “relative hierarchy on argument structure - merge order on syntax - word order on PF”. In the final analysis, the optionality of word order, difference of discourse focus and constraint of imperative force in V-Lai+NPth construction are motivated by ‘event-HEAD’ strategy of speakers. And the strategy is implemented in event structure, narrow syntax and phonetic form step by step.