FIRST LANGUAGE MORPHOLOGICAL INTERFERENCE OF ENGLISH LANGUAGE LEARNERS (EFL)

National and regional languages spoken in Indonesia come from Austronesian language family. Meanwhile, English comes from Germanic language family. Cases, Austronesian language family has different morphological pattern with Germanic language family. In line with this issue, some EFL are getting involved with such error in using correct English morphological term. They are interfered by their first language. The aims of this research were to investigate: (1) The forms of first language morphological interference of EFL; and (2) the Factors that cause the morphological interference of EFL speech production. This qualitative research used Simak (scrutinizing) method to collect the data and it was supported by using interview technique. Descriptive analysis and error analysis theories were used to analyse the data. The result showed that they had the problem in using bound morpheme. The factor that affects them in making error was they were still interfered by the construction of language pattern in Bahasa Indonesia.