事件消息是对新近发生的真实事件进行的报道，具有报道性、真实性和时效性。本文从报道内容、结构特点、语篇长度和传播媒介四个方面对事件消息语篇进行限定，并以此为标准从中国新闻网抽取300篇事件消息作为分析对象，从篇章语法理论出发，结合系统功能语法理论，对事件消息语篇的篇章特征、篇章结构、篇章推进和特殊句式进行考察。

本文包括绪论、正文和结语三大部分。绪论部分明确了本文的研究对象和研究意义，梳理了语言学、文章学和新闻学中的相关研究，并从宏观、中观和微观三个方面进行说明。绪论部分还介绍了本文的理论基础和研究方法，交代了语料选取标准和分析过程。主体部分共包括四章，具体内容如下：

第一章考察事件消息的篇章特征。本章从报道方式、报道内容和报道风格三个方面概括了事件消息语篇的篇章特征。报道方式方面，事件消息语篇具有弱时间序列性和弱施事主导性，前者指事件报道过程中，小句或自然段之间的推进具有时间序列性，但不占绝对优势；后者表现在小句主语语义角色的使用上，事件消息语篇中施事主语占比最高，但低于非施事主语的总占比，使语篇呈弱施事主导性。报道内容方面，事件消息语篇具有真实性和时效性，前者通过事件来源语和时空真实性体现；后者通过时间名词“目前”和时间副词“正在/正/在”体现。报道风格方面，事件消息语篇具有正式性，书面语介词或介词结构、并列标记和递进标记的使用提高了语篇书面语色彩，从而提高语篇的正式度；连动句、介词结构和长定语使小句结构复杂，通过句式的复杂性体现语篇的正式性。

第二章考察事件消息的篇章结构。事件消息语篇分为标题、导语和主体三个部分，标题和导语概述事件，主体展开并补充标题和导语概述过的内容。标题、导语和主体均对核心事件进行报道，非核心事件主要分布在主体中，包括反应、知识背景和相关事件三类语义结构。从标题到导语再到主体均对同一事件进行报道，篇章位置不同，报道方式不同，本章从报道内容和语言表现形式两个方面对比了三度反复报道结构中核心事件的差异，前者表现为：不同语义类型小句的占比差异、事件小句中构成要素的分布偏好、篇章结构起始成分的不同使用情况；后者表现为话题的三度引入和述谓的三度变化。

第三章考察事件消息的篇章推进。事件消息语篇自然段之间的推进手段包括事件来源语、时间词语、名词性成分和关联标记四种。段间推进包括导语和主体之间的推进、主体内部不同语义结构之间的推进。导语和主体间使用事件来源语、时间词语和名词性成分三种推进手段，不同推进方式中回指导语的占比较高，与导语和主体间“概述—详述”的推进方式相适应。主体段间推进包括时间顺序推进、时间倒序推进、“概述—详述”推进和并列推进四种，时间顺序推进中较多使用时间词语推进语篇；另外三类推进方式中事件来源语推进手段占优势。段内小句主位推进模式分为同一型、并列型、延续型、跳跃型、总结型、小句派生型、主位派生型、述位派生型和交叉型九类，标题使用并列型、同一型和延续型三种推进模式，导语和主体中各类推进模式均有出现。从各推进模式的占比上看，标题中并列型推进占优势，导语和主体中同一型推进占优势。

第四章考察事件消息中的无定NP主语句和“经/经过”状语从句。一是无定NP主语句，从语法形式上看，事件消息语篇中复杂无定NP主语和复杂谓语的使用频率较高，但也允许简单式无定NP主语和简单谓语的存在，句法成分的选择主要是满足消息报道的需求，而非句式的强制性。从信息地位上看，事件消息语篇中的无定NP主语句主要用于表达前景信息。从篇章功能上看，无定NP主语句主要用于引入报道对象和概述事件。二是“经/经过”状语从句，从语法结构上看，该结构包括主语、“经/经过＋VP”、时间标记构件“后”三个部分，主语和“后”可以不出现，“经/经过＋VP”结构必须出现。“经/经过”状语从句具有篇章衔接功能，这种篇章衔接功能的浮现受信息地位和语境驱动的影响。

结语部分从篇章特征、篇章结构和信息地位三个方面总结了事件消息语篇中与其相适应的语言表现形式，并指出进一步研究的空间。

Event news is a report on current real events, featuring reportability, authenticity and timeliness. This article defines the event news discourse from four aspects: report content, structural features, discourse length and media. Based on that, three hundred pieces of event news have been selected from China News as the subjects of analysis. Drawing on the Discourse Grammar Theory and Systemic Functional Grammar Theory, this thesis examines the discourse features, discourse structure, and discourse progression of event news discourse, together with special sentences.

This thesis consists of three parts: introduction, main text, and conclusion. The introduction section clarifies the research object and significance of this article, summarizes relevant research in Linguistics, Literary studies, and Journalism, and provides explanations from macro, meso, and micro perspectives. This section also introduces the theoretical foundation and research methods, and explains the selection criteria and analysis process of the corpus. The main body consists of four chapters as follows:

Chapter 1 examines the discourse features of event news, which is summarized from the perspectives of report methods, content, and style. As to the report methods, event news features incomplete contingent temporal succession and incomplete agent orientation. The former refers to the temporal sequence exhibited in the progression of clauses or paragraphs of event reporting, but it does not have an absolute advantage. The latter is mainly reflected in the use of semantic roles of subjects. Although agent subjects account for the highest proportion in event news discourse, they are still lower than the total proportion of Non-agent Subjects, resulting in incomplete agent orientation. Regarding the report content, event news features authenticity and timeliness. The former is reflected through the information source and spatio-temporal authenticity, while the latter is presented via the use of temporal nouns such as "Muqian(目前)" and temporal adverbs such as "Zhengzai/Zheng/Zai(正在/正/在)". In terms of reporting style, event news discourse features formality. The use of prepositions or prepositional structures, coordination markers, and progressive markers enhances the written features of discourse, thereby improving their formality. The application of serial verb sentences, prepositional structures, and long attributive clauses makes complex sentence structures, reflecting the formality of the texts through the complexity of sentences.

Chapter 2 focuses on the discourse structure of event news. The event news discourse is divided into three parts: The Title, The Lead, and The Body. The title and the lead are overview about the event, while the body extends and supplements the content summarized by the title and the lead. All the three parts report on the core events, while non-core events are mainly distributed in the body, including reactions, knowledge background, and related events. The same event is reported from the title, the lead and then to the body, with different reporting methods employed at various textual position. This chapter compares the differences in the core events in the triple-repetition reporting structure from the aspects of reporting content and linguistic expression. The former is manifested in the difference in the proportion of various semantic clauses, the distribution preference of the constituent elements in the event clauses, and the different use of the initial components of the text structure, while the latter is presented in the triple-introduction of the topic and the triple changes of the predicate.

Chapter 3 examines the discourse progression of event news. The progressive methods between natural paragraphs in event news discourse include four types: information source phrases, temporal expressions, nominal components, and connecting markers. Inter-paragraph progression includes that between the lead and the main body, as well as between different semantic structures within the main body. Between the lead and the main body, three main progression methods are employed: information source phrases, temporal expressions, and nominal components. Among these different progression methods, the proportion of back-references takes up a relatively high proportion, which is compatible with the "overview-detail" progression pattern between the lead and the main body. The progression within the main body paragraphs includes four types: chronological progression, reverse chronological progression, "overview-detail" progression, and parallel progression. In chronological progression, temporal expressions are frequently used to advance the text, while information source phrase dominates in the other three types of progression, information source phrases. The thematic progression (TP) of clauses is divided into nine types: TP with a constant theme, TP with two alternate themes, linear TP, intermittent TP, TP with merged theme(s) and rheme(s), TP with derived clauses, TP with derived themes, TP with derived rhemes, crisscrossed TP. Titles employ TP with two alternate themes, TP with a constant theme, and linear TP, while various progression patterns appear in both the lead and the body. In terms of the proportion of each progression method, TP with two alternate themes dominates in titles, while TP with a constant theme takes the lead in both the lead and the body.

Chapter 4 examines the indefinite-subject sentences and "Jing/Jing Guo(经/经过)" adverbial clause in event news discourse. Regarding indefinite-subject sentences, from a grammatical perspective, complex indefinite-subject and complex predicates are more frequently used in event news discourse, but simple indefinite-subject and Simple predicates is also allowed. The selection of syntactic components is mainly to meet the needs of news reporting, rather than mandatory sentence structures. According to the information status, indefinite-subject sentences in event news discourse are mainly used to express foreground information, while it is mainly applied to introduce the reporting subjects and summarize the event from the perspective of discourse function. In addition, this article discuss the "Jing/Jing Guo(经/经过)" adverbial clause. "Jing/JingGuo(经/经过)" adverbial clause includes three parts: the subject, "Jing/JingGuo(经/经过)+VP", and the time marker "Hou(后)". The subject and "Hou(后)" can be omitted, whereas the "Jing/JingGuo(经/经过)+VP" structure must not. The "Jing/JingGuo(经/经过)" adverbial clause serves as the cohesion in discourse, which is influenced by the information status and context.

The conclusion summarizes the corresponding forms of language expressions in event news discourse from three aspects: discourse features, discourse structure, and information status, and the space for further research is also pointed out.