Abstract:
This study aimed to explore the grammatical obstacles facing Sudanese secondary school Students' in writing composition. The study adopted descriptive method to carry out the study. Questionnaire and test were used as tools for data collection. The statistical packages for social sciences (SPSS) was used to analysis the acquired data. The findings of the study revealed students have low abilities in using grammar correctly when writing composition in English, it also showed the unnecessary shifting of tenses from past to present and vice versa. The researcher highly recommends ELT teachers should exert their efforts to help students to understand grammar also students should be encouraged to practice writing composition neatly through.