Question

가기 전에 문을 잠그세요 The -기 전에 principle attaches to verb stems and corresponds to English expressions 'before ...ing'. The -기 전- pattern cannot be preceded by tense markers.

Accepted Answer

Lock the door before you go

Front	가기 전에 문을 잠그세요
Back	Lock the door before you go
Notes	The -기 전에 principle attaches to verb stems and corresponds to English expressions 'before ...ing'. The -기 전- pattern cannot be preceded by tense markers.

전에 기 가기 문을 잠그세요 Lock Door Principle