فطين نبيلة محمد عبد المرئيسFatin Nabilah Mohd Abdul Murais2025-05-282025-05-282025https://studentrepo.iium.edu.my/handle/123456789/32969Interlanguage is a natural phenomenon among second-language learners. Through interlanguage, incorrect linguistic elements as well as errors can be improved into correct linguistic elements. This study aimed to discover the types of positive and negative interlanguage in the use of Masdar in writing among Arabic language students at International Islamic University Malaysia, particularly how using the Masdar affects students’ interlanguage processes in writing. This study utilised the qualitative research method, using document analysis of students’ writing and semi-structured interviews as the main data collection methods. The study’s sample was Arabic Language students in the second and third year of their bachelor’s degree during Semester I 2023/2024. The study found that the types of positive interlanguage in the use of Masdar in the student’s writing among Arabic language students exceeds the types of negative interlanguage in the use of Masdar in their writing. The types of positive interlanguage in the use of Masdar reached fifty-two patterns, while the types of negative interlanguage in the use of Masdar were twenty-four patterns. The findings indicate that three interlanguage processes influenced students’ writing when using the correct form of Masdar: language transfer, transfer of training, and second-language learning strategies. On the other hand, the interlanguage processes that affected them while using the wrong form of Masdar in their writing included all the aforementioned processes, with an added element of overgeneralization. The study concluded with several recommendations to improve the use of Masdar in writing, particularly among Arabic Language studentsarCopyright International Islamic University Malaysiamaster thesis