How do you connect sentences together? I already understand that you use -서, -으니까, -기 때문에, etc. for 'because', 'since', 'so', etc. But how do you string two sentences together using 'that', and any other complex sentence structures for that matter? Example. I know. = 나 알아. You ate the cake. = 너는 케이크를 먹었어. I know that you ate the cake. = ? Thank you in advance! 최고!