The purpose of this qualitative study was to investigate speech acts performed by Iranian EFL learners on the social network of Facebook in their interaction with their teacher and with their peers in response to divergent and evaluative questions. A page was constructed for the students in order to provide the opportunity for their answering divergent and evaluative questions posed by the researchers. A total of 240 comments including 1680 speech acts were collected from five EFL students during an academic semester. Content analysis of the collected data revealed that participants primarily used expressive speech acts in response to divergent questions and directive speech acts in response to evaluative questions. The results also revealed differences in using emoticons regarding the difference in power relations between the teacher and students. Further findings and implications are discussed in the paper.
