语境即语言交际的社会环境。在语境理论分析中,英国功能语法学家首先将决定语言特征的情景因素分为语场(field)、语体(tentor)和语式(mode)三个变项。语境不同,同一表达方式会产生不同的意义。如Which chicken do you want toeat?在养鸡场,意为“你要哪只鸡吃食?”但如果在肉食店,意思就变成了“你想吃哪只鸡?”语境中各个变项的变化又会引起语言的变异,产生不同类型的语域(reg- Context is the social environment of language communication. In the analysis of context theory, the British functional grammarians firstly divided the contextual factors that determine the language features into three variables: field, tentor, and mode. In different contexts, the same expression will have different meanings. For example, Chicken chicken do you want to eat? In a chicken farm, it means “Which chicken do you want to eat?” But if it is in a meat shop, the meaning becomes “Which chicken do you want to eat?” Changes in various variables in the language can cause language variability and generate different types of registers (reg-