Special phrases ( about, for, through, because)

There are 4 words I wanna introduce to you today. They are:
1. about: Noun 에 대해 (서), or in formal is Noun 관 해 (서).
2. for (the sake of; because of): Noun 을/를 위해 (서).
3. through: Noun 을/를 통해 (서).
4. because: Noun 때문에.
* For example:
1. 명동에 대해서 이야 기하 셨어요? Were u talking about Myeong dong?
  - 미국에 대해서 얘기 했어요. I was talking about the USA.
2. 미래를 위해서 열심히 공부하세요! For the future, u must study hard!
3. 종학씨를 통해서 한국말을 많이 배웠어요. I learned a log of Korean through Jonghak.
4. 숙제 때문에 영화관에 가지못하 겠어요. Because of homework, I cannot go to the cinema.