Questions & Answers about i syeocheuga deo joha boyeoyo.
더 means more or -er. In this sentence, it gives the idea of better or nicer.
So 이 셔츠가 더 좋아 보여요 means something like:
- This shirt looks better.
- This shirt looks nicer.
Korean often leaves the comparison unstated, so it may mean better than the other one, better than before, or better than I expected, depending on context.
가 marks 셔츠 as the thing being focused on or identified.
So 이 셔츠가 더 좋아 보여요 has the feeling of:
- This shirt is the one that looks better.
If you said 이 셔츠는 더 좋아 보여요, that would also be possible, but 는 would give a slightly different nuance. It might sound more like:
- As for this shirt, it looks better.
Very roughly:
- 가 = focus on the subject itself
- 는 = topic/contrast
In a situation where you are comparing several shirts and pointing out one of them, 가 sounds very natural.