had been -ing
This expression is also used to indicate the recollection of something that was started in the past but has not ended yet. In such cases, it is used together with a word indicating a specific time or day in the past, such as 지난달, 지난주, 어제, 아까 and 저번에.
1. This expression is also used to indicate something that was often done in the past but is not anymore. In such cases, it is used together with expressions of repetition such as 여러 번, 자주, 가끔, and 항상.
Here, the expression refers to the cafe that the speakers used to go to often but do not visit anymore.
3. This expression can also be used to indicate that something is not new but rather something that has been used from a certain time in the past until the present.
4. This expression is not used for things that have only occurred once and do not repeat.
5. This expression is also used to refer to a behavior or act that has often been repeated from a certain point in the past.
Here, the expression means that the speakers have been going to the cafe often from some time in the past.
The differences between -던 and -(으)ㄴ which expresses the past tense, are summarized as follows.
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