本篇論文旨在研究漢語附加問句的語法深層結構、各種語用功能，及語法分析和語用分析之間的交互作用。 我們認為漢語附加問句的語法深層結構應分為兩類，一種結構等同於簡單的是非問句或正反問句，另一種結構則是由兩個子句結合而成的複雜句。此分析正確地解釋漢語附加問句的某些句法行為。 在語用功能方面，我們認為漢語附加問句可以用來執行兩種主要功能：詢問(Question)及請求(Request)。請求又可分成請求確認(Request for Confirmation)及請求行動(Request for Action)兩種。 經由語法深層結構及語用功能之間的交互作用，因而衍生出漢語附加問句的外在行為表現。 / Tag questions have never been a hot issue among linguists studying questions in Mandarin Chinese. According to previous analyses, since tag questions are merely instances of A-not-A or yes-no questions with sentential subjects or topics, there is no need to recognize a separate category for Mandarin tag questions. In this thesis, it is shown that the underlying form and pragmatic functions of Mandarin tag questions are not so simple and should not be ignored in that way. Based on our syntactic analysis, the underlying structure of Mandarin tag questions is divided into two subparts, and each performs various syntactic behavior. One is the structure of simple A-not-A or yes-no questions with sentential subjects or topics and the other is the construction of coordination. The former can serve as the subject or direct object of a verb while the latter cannot. To interpret the complicated relationship between form and function of the Mandarin tag question, a pragmatic analysis is moreover proposed. Based on various illocutionary intents and speaker's psychological states, tag questions are divided into two major kinds to perform different illocutionary acts: 'Question' and 'Request' (including request for confirmation and for action). After relating our syntactic approach to pragmatic analysis, it is manifest that the interaction between underlying form and pragmatic functions results in the surface structure of Mandarin tag questions.