This is the 9231st most frequent Korean word.
걸까요
"Shall we?" or "Should we?"
'걸까요' is used here to express curiosity or uncertainty about the weather tomorrow (asking for a guess or prediction).
내일 날씨가 좋을까요?
Will the weather be good tomorrow?
'걸까요' functions here as a polite suggestion, asking for an opinion or idea about the travel destination.
우리 어디로 여행을 갈까요?
Where should we go for a trip?
'걸까요' conveys uncertainty or a speculative question about the helpfulness of the book.