Febrian Rizqi PRADANA Pengarang Dr. Umar Fauzan, M.Pd. Dosen Pembimbing 1 Rostanti Toba, M.Pd. Dosen Pembimbing 2 Dra. Sitti Hadijah, M.Pd. Penguji 1 Rostanti Toba, M.Pd. Ketua Penguji Dini Irawati, M.Pd. Penguji 2

Febrian Rizqi Pradana. 2020. Error Analysis Of Applying Inflectional Morpheme In Descriptive Writing At Tenth Grade In SMK Negeri 14 Samarinda. Thesis. Teacher Training and Tarbiyah Faculty. English Education Department. State Islamic Institute of Samarinda. Advisors: Dr.Umar Fauzan, M.Pd as the first advisor and Rostanti Toba, M.Pd as the second advisor. The background of this research were difference between word formation in Indonesian and English can cause some errors in students` writing. Errors are the result of incomplete learning and linguistic incompetency of the learners and errors cannot be self-corrected. Therefore, the errors made by students indicate that the learners do not mastered English yet. To know what are the errors made by the learner, it needs to use error analysis (EA). Beside that, based on the researcher’s experience during teaching English, most of the students have difficulties in learning grammar. The most common of the students’ difficulties in learning grammar is about English morphological inflection although the teacher has explained English morphological inflections to the students and the grammatical rules about it in the process of English learning. The objectives of this research were to know the types of the errors in applying inflectional morphemes made by students in descriptive writing, and to know the numbers of each type of errors in applying inflectional morphemes made by students in descriptive writing. The research used descriptive qualitative. The main instrument is document.Therefore, the researcher would use several steps suggested by Ellis and Barkhuizen, they are collecting a sample of learner language, identifying errors, classifying of errors, explaining of errors, and evaluating of errors. This research is carried out on the tenth grade students of SMK Negeri 14 Samarinda. There are 18 students as participants. The result showed that types of errors in the use of English inflectional morphemes that were found in this research only five types from eight types. They are plural inflection, possessive inflection, superlative inflection, past participle inflection, and third-person singular inflection. Which the rest of the types of errors (progressive inflection, past tense inflection, and comparative inflection) were not found. It also showed that plural inflection error was on the first rank with sixteen errors, then it was followed by third-person singular inflection error on the second rank with six errors, on the third rank were possessive inflection and past participle tense inflection with five errors, and the last was superlative inflection with four errors.