Breakdown of chaseoneul bakkugi jeone banghyangjisideungeul kyeogo sagakjidaereul hwaginhaessseupnida.
Questions & Answers about chaseoneul bakkugi jeone banghyangjisideungeul kyeogo sagakjidaereul hwaginhaessseupnida.
차선 means lane. The form 차선을 is 차선 + 을, where 을/를 is the object marker.
Here, 차선을 바꾸다 means to change lanes, so 차선 is the thing being changed and takes the object marker:
- 차선을 바꾸다 = to change lanes
In natural Korean, object markers are sometimes omitted in casual speech, but in a careful written sentence like this, 차선을 is completely normal.
바꾸기 전에 means before changing or before you change.
This pattern is:
- verb stem + -기 전에 = before doing ...
So:
- 바꾸다 = to change
- 바꾸기 전에 = before changing
The -기 turns the verb into a noun-like form, so literally it is something like before the act of changing.
Compare:
- 먹기 전에 = before eating
- 가기 전에 = before going
- 자기 전에 = before sleeping
This is a very common pattern in Korean.