It is a common goal to try to educate students as natural users of language, as emphasized by the studies on learning English today and the recently renewed 2017-2018 curriculum in Turkey. In this respect, the learning of language based on four basic skills is considered to bring the importance of these skills is emerging. This study is a qualitative study that determines the teachers' opinions on the problems they encounter in the process of teaching four basic skills. At this qualitative study in the 2017-2018 academic year, teachers were chosen by the criterion sampling method, face-to-face interviews were conducted with eight English teachers working in a city of Turkey. The research was conducted in a case study design in a holistic multi-state pattern. Semi-structured interview form was used as data collection tool. Data was analyzed by content analysis method. Teachers' opinions on the subject were discussed according to sub-problems and comments and suggestions were made.