To conjugate a predicate in the past tense, a pre-final ending ending is added to a predicate's stem. There are 2 steps to conjugate a predicate in the past tense.
• Add ㅓ or ㅏ to the predicate stem.
• Then add ㅆ as a to the final syllable.
For example, in order to conjugate the verb ㄷ-irregular verb in the past tense:
걷다 + (ㅓ or ㅏ) + ㅆ = 걸어 + ㅆ = 걸었
If the predicate is conjugated in the intimate speech level then 어 is added as the final syllable. If the predicate is conjugated in the polite speech level then 어요 is added as the final syllable.
?As for the movie you saw yesterday, was it interesting?
The past tense may also be used to describe a recently completed action. For example, if an office worker is already inside the office after arriving, this office worker can say the following phrase.
When an additional 었 is added to the first past tense ending, the predicate's meaning is more remote than the recent past. For example, or This can be used when recounting events which are in the distant past and no longer immediately relevant.
유민이유민이 was tall when (she) was in middle school.