Abstract
In this paper, we take conversations from The Big Bang Theory as the corpus, in which we study the lingual humor. The lingual humor will be investigated with different contextual theories in systemic functional linguistics in order to have a full understanding of contextual knowledge in sitcoms. We will explore possible ways to enhance the ability of appreciating humor, thus enrich their knowledge about language, culture and social activities.
Keywords   systemic functional linguistics   context   lingual humor  The Big Bang Theory

 本文以美国当代情景喜剧《生活大爆炸》为例，试图运用系统功能语言学下对于语境的分类理论来探讨《生活大爆炸》中的言语幽默，分析解读喜剧幽默言语所需掌握的语境知识，希望能对提升读者对幽默的欣赏水平和创造能力有所帮助，对丰富学习者的语言、文化及社会知识有所帮助。
关键词  系统功能语言学 语境 言语幽默 生活大爆炸

Humor is an old topic to investigate which embodies both linguistic and scientific meanings. Most researches are based on the study of humor from the perspective of the cooperative or the relevance theory, or on the analysis from the cultural perspective, with fruitful achievements at the end. Yet it is found that there is limited research on the analysis of the contextual perspective from the systemic functional linguistics. In view of the above facts, this paper endeavors to analyze the contextual features and functions of lingual humor in situational comedy.
English language is rich in humor. The word “humor” originates from French. It is a piece of art as well as a way of life. It can bring a lot of pleasure as well as inspiration. Basically, there are two kinds of humor: one is “Lingual-humor”, the other is “Non-lingual humor”. “Lingual-humor” is a kind of humor generated through the use of language, whereas “Non-lingual humor” is generated without the tool of language. It is quite interesting and practical to make analysis on the generation of humor, especially the “Lingual-humor” which is used by people quite often.