Past Perfect Tense A/V – 았/었었어요

Past Perfect Tense A/V – 았/었었어요

This patternis used to express something or a situation that occurred in the past but did not continue or something separate from the present. In English " did/had (in the past). It is formed by adding -았어요 to the stems of verbs and adjectives with the stems ending in vowel ㅏ or ㅓ.Otherwise, -었었어요 is added. For verbs ending in 하다, 했었어요 is added.