Abstract:
This study has dealt with investigating difficulties of using affixations encountered be EFL learners at Sudanese universities, the study consisted of five chapters; the first chapter is an introduction, statement of the problem, research questions, research hypotheses, objectives, significance, limits and methodology of the study. The second chapter showed the theoretical frame work and literature review; concentrated on affixations, the main rules associated with adding affixes to English words, as well as English inflectional and derivational morphology. The third chapter concerned the practical part of the study as an introduction, subject, instrument, data collection procedures, reliability and validity. The fourth chapter revealed data analysis, results and discussion. The last chapter reflected findings, recommendations, conclusion, and suggestions for the further studies. The researcher has concluded that there are some difficulties and variance in using affixes correctly. Therefore, the researcher has recommended more studies to investigate the study from the different views.
