本文在生成语法理论框架下考察了先秦汉语中不同类型的宾语前置现象，并根据它们的句法结构形式，重点讨论了“是”“之”的性质异同、宾语前置的句法路径以及句法操作过程。主要结论为：

   （一）先秦汉语的前置宾语可分为两大类六小类，不同类型所表现出的结构形式有所不同。

   （二）用于宾语前置结构的“是”和“之”都是指示代词。其中，“是”指示性强，具有强调和提宾双重作用，主要标记对比焦点；“之”指示性弱，其主要功能是提宾和标记话题焦点，没有强调作用。
   （三）先秦汉语宾语前置的落点至少可以占据四个不同的句法位置O1、O2、O3、O4，它们依次位于vP内部、vP与TP之间、TP与FocPCon之间以及FocPCon的指示语内部。其中，宾语到达O1-O3主要通过合并和移位来完成，到达O4则还需要借助复制和加接等句法操作。
   （四）总体观之，先秦汉语中疑问宾语前置和非疑问宾语前置经过的句法路径是一致的，涉及的句法操作也是平行的，二者并没有本质区别，可以统一起来。

      Based on the Generative Grammar, this thesis investigates some different types of object-fronting of Pre-Qin Chinese. According to their syntactic structure forms, the main problems discussed here include the properties of the demonstrative pronouns shi(是) and zhi(之) , the syntactic paths and operations of object-fronting. The main conclusions are:
   (1) The object-fronting in Pre-Qin Chinese can be divided into two categories and six subcategories, which present different types of syntactic structure forms.
   (2) Both shi(是) and zhi(之) used in the object-fronting structures are demonstrative pronouns, but the former is a strong demonstrative with the functions of object-emphasizing,  object-raising and marking contrasitive focus, while the latter is a weak demonstrative with the functions of object-raising and marking topical focus.
   (3) At least four different syntactic positions O1, O2, O3, and O4 can be occupied by the landing sites of object-fronting in Pre-Qin Chinese, which are successively located in the interior of vP, between vP and TP, between TP and FocPCon, and within the specifier of FocPCon. The objects arrive at O1-O3 mainly by Merging and Moving, while the objects arrive at O4 needs extra syntactic operations such as Copying and Attaching. 
   (4) Generally speaking, the syntactic paths of interrogative object-fronting and non-interrogative object-fronting in Pre-Qin Chinese are consistent, and the syntactic operations involved are parallel. There is no essential difference between the two, so they can be unified.