The purpose of this study is to investigate the development of linguistic competence through the use of the adverbs co-occurred with the connective endings in the spoken Korean language corpus by age. And we will also test the possibility of the application of our findings to Korean Language Education for foreigners. In Korean, some adverbs necessarily co-occur with the connective endings (for ex., `만약`, `아무리`, `하도`, `가령` etc.). We found that the most adverbs, adopted in the research, appeared in the spoken language corpus except the adverb `설 령`. The adverbs such as `만약, 아무리, 하도` appeared most frequently than any other adverbs and in the early ages. The adverbs such as `만 일에, 비록, 가령, 설사` appeared very later. On the other hand these adverbs have different combination constraints with the connective endings. We analyzed the combination constraints of the adverb and the connective endings and so forth, based on the spoken language corpus. We expect that the results of this study might be applied to the Korean Language Education for foreigners, the description of Korean dictionary, and NLP(natural language process) etc. Specially, we proposed the list of the adverbs and the connective endings for the vocabulary education in International Korean Education.