There are several connective endings that link two clauses in the relation of a reason and result, cause and effect, and the basis and following action. -길래(기에) and -ㄴ데/는데 are two of them, and I'd like to show you the difference between them. When using -길래(-기에), the full sentence just expresses a simple fact. The type of sentence is usually a declarative one. 비가 많이 오길래 그냥 집에 있었어. It rained a lo..