This study investigates the semantics of MOOD and the syntax of the let’s-construction in English from a Cardiff Grammar approach. After reviewing previous studies and specifying basic notions in Cardiff Grammar, the study analyzes and discusses the semantics of MOOD and the syntax of the construction with linguistic data from COCA. The study shows that semantically the let’s-construction realizes [proposal for action], where three choices could be made: [by self and addressee], [by self] and [by addressee], with [by self and addressee] having the highest frequency. Dependent on these choices, more delicate choices could be made with different probabilities, such as [firm proposal], [statement of assumption], [statement of wish], [suggestion], [offer], [self-deliberation] and [request]. Syntactically, in most cases the study analyzes let in the construction as a direct element of the clause, i.e. Let Element (L), ‘s as the Subject and the lexical verb following let’s as the Main Verb. In highly specialized cases, let’s as a whole is analyzed as L, and the nominal group following let’s as the Subject. The basic syntactic forms to realize MOOD meanings of the construction are ‘L^S’ and ‘O^L’. This unique clause element of L plays an important role in MOOD selection of the construction.

中文翻译：

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英语中情绪的语义和 Let's-construction 的句法：一种基于语料库的卡迪夫语法方法

本研究从 Cardiff Grammar 方法研究英语中 MOOD 的语义和 let's-construction 的句法。在回顾以往研究并明确Cardiff Grammar 的基本概念后，本研究利用COCA 的语言数据分析和讨论了MOOD 的语义和结构的句法。研究表明，let's-construction在语义上实现了[行动建议]，可以做出三种选择：[自己和收件人]、[自己]和[收件人]，其中[自己和收件人]最高频率。根据这些选择，可以做出不同概率的更微妙的选择，例如[确定方案]、[假设陈述]、[愿望陈述]、[建议]、[报价]、[自行考虑]和[请求] ]。语法上，在大多数情况下，研究分析 let 在结构中作为从句的直接元素，即 Let 元素 (L) 作为主语，将 let's 后面的词汇动词作为主要动词。在高度专业化的情况下，let's 整体被分析为 L，而 let's 后面的名义组作为主语。实现结构的MOOD意义的基本句法形式是'L^S'和'O^L'。L 的这个独特的从句元素在结构的 MOOD 选择中起着重要的作用。