When to use need in Korean
Korean: 필요[ pil-yo ]

When to use it
Need (필요) means something is required or helpful for what you want to do. You use it when you talk about needing things like water, time, money, or help. It is very common in everyday situations such as school, shopping, and travel.
Example sentences
물이 필요해요.
I need water.
학교에 갈 때 공책이 필요해요.
I need a notebook when I go to school.
밖에 나갈 때 코트가 필요해요.
I need a coat when I go outside.
선생님, 도움이 필요해요.
Teacher, I need help.
이 셔츠를 사려면 돈이 더 필요해요.
I need more money to buy this shirt.
여행 갈 때 여권이 필요해요.
I need a passport when I travel.