A Critical Discourse Analysis of Barack Obama’s Speeches

The Critical Discourse Analysis is often applied to analyze political discourse including the public speech, in which the speaker wins favorite response from the audience. This paper, based on Critical Discourse Analysis theory and Systematic Functional Linguistics, analyzes Barack Obama’s presidential speeches mainly from the point of transitivity and modality, in which we can learn the language how to serve the ideology and power. Moreover, we can have a better understanding of the political purpose of these speeches.