The purpose of this study is to examine the effects of focus-on-form approach on learning connective ending '-느라고' of Korean language learners. Input enhancement and consciousness raising tasks were applied and compared as an effective way of this grammar instruction among various techniques of focus-on-form approach. The participants in the study are intermediate-level Korean language learners. They were divided into two groups, and teaching activities were provided undertaken based on two different methods. According to the results, significant differences were not found between the two methods, but the upper-level students had higher achievements than the lower-level students. Although no significant difference was found between the input enhancement and consciousness raising tasks, it was found that the focus-on-form approach can be recommended as a way to teach grammar effectively, especially it is effective for upper-level learners.