This study examines the linguistic devices discourse participants use in English teaching radio programs to shift their interactional frame from presenter/listener to presenter/presenter. Frame theories have been widely used to explain the way people organize their knowledge and to understand social interaction, but little research has been done on the ways by which people use to shift frames in social interaction. This study finds that the linguistic devices people use in the discourse include phonological (e.g. high key), lexical (discourse markers such as well, so, but, okay, etc.) and interactional ones (questions). It suggests that discourse participants need to carefully operate frame shifting so that others can align themselves to a proper frame and avoid frame breaking and communication breakdown.