Abstract:
The purpose of this study is to investigate the difficulties of using and understanding the central modal auxiliary verbs experienced by Sudanese learners of English language at university level . The results show that students face serious problems in using central modal auxiliary verbs . The samples used in the research are students of Sudan University of Science and Technology, College of Languages, Department of English Language , they are forty in number. The research is quantitative and the tool used is a test . The researcher recommends the students to work hard in order to get rid of the confusion happens in using the central modal auxiliary verbs , also students should read about grammar to better their knowledge about the modal verbs .
