be + ing
was ~ing
were ~ing
I was going. 나는 가고 있었어.
We were going. 우리는 가고 있었어.
I was having dinner. 나 저녁 먹고 있었는데.
I was talking to him. 나 걔량 얘기하고 있었는데.
He was talking on the phone. 걔 전화 중이었어.
He was taking a shower. 걔 샤워 중이었어.
They were taking a class. 걔네 수업 중이었어.
They were dozing off. 걔네 졸고 있었어.
시제 훈련
study
I was studying. 나 공부하고 있었어.
I studied. 나 공부했어.
I study. 나 공부해. (언제나/늘)
I will study. 나 공부할거야.
I am going to study. 나 공부할 계획이야.
Look up the dictionary. 사전을 찾아보다.(펼쳐서 보다)
find the dictionary. 사전을 찾다.(어디있는지 찾다)
I was looking up the dictionary. 나 사전 찾고있었어.
I looked up the dictionary. 나 어제 사전 찾았어.
I look up the dictionary. 나 사전 찾아.(언제나/늘)
I will look up the dictionary. 나 사전찾아야지. (즉흥 결정)
I am going to look up the dictionary. 나 사전 찾아볼 계획이야.(계획)
출처 : 야나두