Abstract:
This study aims at investigating students' problems in using polite expressions of greetings, permissions and requests. It has been conducted for the students of second year at Sudan University of Science and Technology. The researcher adopted the descriptive statistical analytical approach, using a test as a tool for gathering data. The sample of this study consists of 30 participants including both genders. After the analysis data process; the researcher has come out with these findings; students are familiar with polite greeting expressions. In contrast, they are no longer able to ask for permissions and making requests politely when they interact in different social context. And they do support the suggested ways of adjusting polite expressions. Depending on the results o the study the researcher recommends that; there should be an English lab for the communication courses (audio-visual aids) to reflect the linguistic behaviors of the native speakers. And these courses should be taken into account from the lower university levels.