Video Lesson and Downloadable Worksheet. It is not mandatory to watch the video. Use these materials to revise or to feel more comfortable in the class. 증상 Symptoms, -(으)세요/-지 마세요 집안일 Housework, -고 있다 맛 Taste, -지요? 일&공부 work&study, -(으)면서 «1234567»