English Grammar in Use / Grammar in Use Intermediate 학습기록UNIT 12 for and since when … ? and how long … ? for 과 since 차이 when 과 how longEnglish Grammer in Use UNIT 12 for and since when … ? and how long … ?UNIT 12: for and since / when …? and how long …? AWe use for and since to say how long something has been happening. 1. We use “for” + a period of time:“for”는 특정 기간을 나타낼 때 사용. 이때 기간은 과거에서 지금까지 ..