Past Perfect Tense A/V – 았/었었어요

Past Perfect Tense A/V – 았/었었어요

This pattern is used to express something or situation that occerred in the past but did not continue or something separate from the present because it occurred much earlier than when the speaker is describing it. In English " did/had (in the past ). It is formed by adding -았었어요 to the stems of the verbs and adjectives with stems ending in vowel ㅏ or ㅓ.Otherwise, -었었어요 is added. For verbs ending 하다, 했었어요 is added.