“에” has a few meanings which is to, at/in.  So, it is high frequency and you will hear a lot. You need to classfied the meaning by text. The best way to understand the “에” is reading many kinds of examples. I will give you some examples to study and ask some questions you can guess.

I am going to school/ 저는 학교에 가요/jeo nun hak kyo ae ga yo.

She is at/in school/ 그녀는 학교에 있어요/ gu neoy nun hak gyo ae it eo yo.

There is no computer in the office/ 사무실에 컴퓨터가 없어요/ sa mu sil ae computer ga eob sseo yo.

My mother is going to my grand mother’s house tomorro/ 내일 어머니는 저의 할머니 댁에 가요/ nae il eo meo ni nun jeo ue hal meo ni dak ae ga yo.  댁 is honorific way to say house (집).

Are you able to say differences above? Now, you can guess the meaning of “에” from examples below

1. 밥 먹으러 식당에 가요.
2. 친구 만나러 공항에 가요.
3. 책상에 연필이 있어요.
4. 집에 동생이 없어요.
5. 내일 뉴욕에 가요.
6. 내은은 부산에 놀러 갈 거예요.

Answers are on the bottom, and please watch the video to learn more.

1. to 2. to 3. on 4. in 5. to 6. to