Breakdown of chinguga jigeum jihacheoreul taneun geos gatayo.
Questions & Answers about chinguga jigeum jihacheoreul taneun geos gatayo.
Both are possible, but they give slightly different nuance.
- 친구가 marks friend as the subject being identified or focused.
- It can sound like It seems that my friend is taking the subway right now.
- 친구는 would mark friend as the topic.
- That can sound more like As for my friend, it seems they’re taking the subway right now.
In this sentence, 가 feels natural because the speaker is making an observation or guess specifically about the friend.
지금 means now / right now.
In Korean, adverbs like 지금 are fairly flexible in position, as long as they appear before the main predicate. So these are all possible:
- 친구가 지금 지하철을 타는 것 같아요.
- 지금 친구가 지하철을 타는 것 같아요.
- 친구가 지하철을 지금 타는 것 같아요.
The original version sounds very natural. Putting 지금 before 지하철을 타는 clearly tells you the action is happening now.