once a week - 일주일에 한 번 twice a week - 일주일에 두 번 on weekends, every weekend - 주말마다 ex) - I am going bowling ~ - It started a week ago. (two weeks ago, three days ago) be going to V ~할 예정 go Ving V 하러 가다 ex) I'm going to go bowling after the class. How long have you played the bowling? It has been 3 months. * How long will it take VS How long does it take -> will == 자신이 모르는 정말 미래를 물어보는(뭐 음 뭐 설문조사를 ..