摘要
An empirical research is done on how political Obama＇s 2015 State of the Union Address as the corpora sample speeches adapt to context in the framework of adaptation theory, taking This paper shows that language choices in the State of the Union Address are adaptive to all the levels of the context, including communicative context （language users, mental world, social world, and physical world） and linguistic context. It is confirmed one of the theoretical stances of adaptation theory that there is no language use without being adaptive to context.
