destination is this sentence right? 지하철역에 도착할 때는 다른 기차를 탈 겁니다. when i reach the train station, i will be taking another train. i'm interested in the kinds of clauses i can put behind the ~을 때 connector. i also want to know the difference in meaning between using "....을 때는" and just using "...을 때" alone. since my sentence might be confusing, here's another example - 지하철역에 도착할 때는 다른 친구를 만날 거예요. when i reach the train station, i will be meeting with another friend. is this correct?