BOUBAAYA Fatima Zahra, BENDRIMIA RayaneBOUGOUFFA Chaima2023-10-242023-10-242023http://10.10.1.6:4000/handle/123456789/4320Abstract This study aims at investigating grammar errors in EFL writing (the case of third-year secondary school students). It adopted the descriptive analytical method of research. The data collection tools are a questionnaire and a writing test. The questionnaire aimed to explore the students’ perceptions about their use of grammar in writing, while the writing test aimed to identify the grammatical errors that students make in writing. Participants in this study are 71 3rd year students selected randomly from a population of 160 students. The findings revealed negative perceptions about their use of grammar and low abilities in using them correctly in EFL writing. We concluded this study with some recommendations for further researchesThesis