Mohammad, Mona, & Musa Adam Mohammad Abu Zurga. " University EFL Students’ Awareness of Negation as a Politeness Strategy in Requests (A Case Study of the Faculty of Education – Hantoub, University of Gezira, Sudan(2026)." Gezira Journal of Educational Sciences and Humanities [Online], 21.2 (2024): 94-106. Web. 29 Jul. 2026