When to use to forget in Korean
Korean: 잊어버리다[ ij-eo-beo-ri-da ]

When to use it
'잊어버리다' means to forget something. You use it when you do not remember something, or when you leave something behind by accident. It is common in daily life for things like homework, names, keys, or plans.
Example sentences
집에 우산을 잊어버렸어요.
I forgot my umbrella at home.
학교에 숙제를 잊어버렸어요.
I forgot my homework at school.
공원에서 물병을 잊어버렸어요.
I forgot my water bottle at the park.
미안해요, 약속을 잊어버렸어요.
Sorry, I forgot our plan.
가게에서 지갑을 잊어버렸어요.
I forgot my wallet at the store.
여행 가서 여권을 잊어버리면 큰일이에요.
It is a big problem if you forget your passport on a trip.