기존에

In a sentence

• 기존에 사용하던 방법을 개선해야 합니다.

  We need to improve the methods we were previously using.

  Here, '기존에' is used to refer to methods that were in use before or previously.

• 기존에는 이 문제가 잘 알려지지 않았습니다.

  Previously, this issue was not well known.

  In this case, '기존에' denotes the prior state or condition where the issue was not widely recognized.

• 기존에 있던 자료를 모두 정리했습니다.

  All the previously available materials have been organized.

  Here, '기존에' emphasizes that the materials were already existing or in place before the current action.