Anna Vania Angelia Un Luis Pengarang YANPITHERZON LIUNOKAS Dosen Pembimbing 2 Tans Feliks Dosen Pembimbing 1 Fransiskus Bustan Ketua Penguji Yanpitherzon Liunokas Penguji 2 Tans Feliks Penguji 1

This thesis is entitled: ‘An Analysis of Grammatical Errors in Writing Descriptive Text by Fourth Semester Students of English Study Program of Nusa Cendana University in Academic Year 2023/2024’. The problems of this study are: (1) what are types of grammatical errors committed by fourth semester students of English Study program of Nusa Cendana University in academic year 2023/2024 in writing descriptive text? (2) what are the likely causes of grammatical errors committed by fourth semester students of English Study program of Nusa Cendana University in academic year 2023/2024 in writing descriptive text? This study aims are: (1) to identify and describe the types of grammatical errors committed by fourth semester students of English study program of in writing descriptive text; (2) to describe the likely causes of errors committed by fourth semester students of English study program of Nusa Cendana University in writing descriptive text. This study used descriptive qualitative method. The subject of this research was fourth semester students of English Study program of Nusa Cendana University in the academic year 2023/2024. There are 35 students. Instruments of data collection are writing test and interview. The researcher used two techniques to analyze the data, namely, identifying and describing techniques. The result shows that there are four types of grammatical errors committed by fourth semester students of English Study Program in writing descriptive text. ( 1) omission error with the total errors was 87 and its percentage of 38%, (2) addition error with the total errors was 71 and its percentage of 31%, (3) misformation error with the total errors was 52% and its percentage of 22% (4) misordering error with the total errors was 22 and its percentage 9%. There are also some causes of errors, namely; Interlanguage with the total errors was 25 causes and its percentage was 31%, 28 intralanguage causes and its percentage was 35%, 22 context of learning causes and its percentage was 28% and 5 communication strategies causes and its percentage was 6%.