系统功能语言学的研究重点之一是语境中语言与语义,尤其是“潜势意义”之间的关系。由语域、语旨和语式构成的语域分析能看出语言功能的实现。本文以语气系统和情态系统为工具,通过对澳大利亚国家电视台一则电视访谈节目的语旨分析,来说明访谈参与者在对待“谁是恐怖主义分子”的这一话题时是如何将自己的真实观点传达给观众的。 One of the focuses of system functional linguistics research is the relationship between language and semantics in context, especially “potential potential”. Register analysis, which consists of register, language and grammar, shows the realization of language function. Based on the tone system and modality system, this essay analyzes the language of a TV talk show in Australia’s state television to illustrate how interviewers treat themselves as real as “who are the terrorists” Point of view to the audience.