批评性话语分析源于批评语言学,揭示语言、意识形态和权力之间的关系。该文章用系统功能语法分析法分析奥巴马针对利比亚事件的政治演讲,探讨演讲者如何利用人称、情态、直接引语等手段实现语篇人际意义,达到向公众提供信息、劝诱听众、控制听众意识形态的目的。 Critical discourse analysis stems from critical linguistics, revealing the relationship between language, ideology and power. This article uses the system functional grammar analysis to analyze Obama’s political speech on the Libya incident and discusses how the speaker can use human, modality and direct speech to achieve the interpersonal meaning of discourse so as to provide the public with information, persuade the audience and control the audience’s ideology the goal of.