本文通过自建语料库,在系统功能语法理论框架下,从情态功能和人称系统角度对2012-2014年美国国情咨文和中国政府工作报告的英译本进行批评性话语分析。研究发现:在情态动词的使用方面,两个英译本在使用情态动词方面较为相似,而在人称系统的使用方面却有很大的差异。 Based on the self-built corpus, this thesis conducts critical discourse analysis of the English version of the 2012 State of the Union Address and Chinese Government Work Report from the perspective of modality and personal system in the framework of systematic functional grammar. The study found that in the use of modal verbs, the two English versions are more similar in the use of modal verbs, while there is a great difference in the use of personal systems.