中文摘要：

本文首先梳理＂于＂的历时演变,＂于＂大体沿着＂动词〈介词〈词缀〈词内成分＂的轨迹演变;然后讨论＂X＋于＋O＂结构中不同类型＂V＂和＂O＂及其组配;接着从互信息值的计算、＂X＋于＂词汇化机制（包括语义相关性、尝试组块策略和心理现实性、共现频率、重新分析）等角度讨论＂X＋于＂的词汇化;最后讨论介词并入及其跨语言的共性,认为介词并入并不是汉语独有的现象,南太平洋群岛的Chamorro语、Bahasa印度尼西亚语、易洛魁族人的Tuscarora语等语言中都存在该现象。

英文摘要：

In this thesis, we discuss the diachronic evolution of＂yu （于） ＂.It generally evolves along the track of＂verb〈 preposition〈affix〈the component of a word＂. Secondly, we discuss the coordination of different kinds of＂V＂ and ＂0＂ in the structure of＂X＋ yu （于） ＋ 0＂. Thirdly, we discuss the lexicalization of＂X＋yu （于） ＂,from calculating its mutual information of the structure of ＂X＋yu （于） ＂, the motivation of lexicalization （which includes semantic correlation, chunk theory and psychological reality）. Lastly, we discuss preposition incorporation and the commonness from cross-linguistics, maintaining that preposition incorporation is popular in different language, such as Chichewa, Austronesian Chamorro, Bahasa Indonesian, Austronesian, etc.