研究以两份重要的政治文本，即 2020 年《中国政府工作报告》和《美国国情咨文》为研究对象，聚焦功能语言学领域下人际功能的情态系统，尝试在对比性批评性话语分析的框架下探索官方发布的英文版《中国政府工作报告》和《美国国情咨文》如何实现基于政治需求和国家力量的人际功能。具体而言，通过结合量性研究和质性研究分析情态动词和人称系统，我们尝试呈现语言形式之下的意识形态，并理清相应的语言策略。

研究发现，2020 年《政府工作报告》和《国情咨文》在报告所做及计划工作外，都有赢得民众支持的目的。前者肯定团结的力量，后者则试图展示总统执政能力。相应地，为使民众获得归属感并提升其国家自豪情绪，包含性第一人称复数代词被大量使用。它们缩短了政府与民众的距离、展现了民众地位和当局对国民在国家发展中贡献的认可。较《政府工作报告》而言，《国情咨文》还倾向于使用单数人称代词。这一集体主义和个人主义的差别也体现在《国情咨文》刻画总统执政能力时第一人称单数代词的使用上。两篇文本中，中量值情态动词“will” 都占到了较高比例，在《政府工作报告》中尤为惊人，它们展现了国家力量、激发民众对未来发展的希望和信心。《政府工作报告》倾向于使用“we will”来展现政府责任和执政能力，而《国情咨文》没有这样的倾向。

his study selects two important political discourses, the Government Work Reports of China (GWRs) and the Union Address of America (SOUA) delivered in 2020 as research objects, taking the personal and modality system under interpersonal function in the field of Systemic Functional Linguistics as the theoretical framework, trying to explore how the officially-published English version of GWRs and SOUA of 2020 realized the interpersonal function based on the politics and state power, making a contrastive critical discourse analysis. By investigation into personal pronouns and modal verbs with qualitative analysis and quantitative analysis, we might reveal the ideology behind the language and clear out the relative language strategy. The present study reveals that: besides reporting works done and in plan, GWRs (2020) and SOUA (2020) both intend to win people’s support. While GWR acknowledges the power of solidarity, SOUA tends to present the president’s administration ability. Accordingly, to transport a sense of belonging and identity, and to arouse people’s national pride, the inclusive first person plural pronouns are used. They shorten the distance between the government and people, indicate the position of people and acknowledge their contribution to the development of the country. Compared to GWRs (2020), SOUA (2020) tends to use singular forms as well. This reflection of collectivism and individualism is also shown in the use of the first person pronouns in SOUA (2020) as to indicate the capacity of the president. The median value “will” takes a surprisingly high proportion, especially in GWRs, showing the national power and arises peoples’ hope and confidence for future development. Also, GWRs tends to use “we will” to show responsibility and administration power, while SOUA doesn’t show the same tendency.