Book good quote

Yet it cannot be bought, begged, borrowed, or stolen, for it is something that is no earthly good to anybody till it is given away.

And if in the last-minute rush of Christmas buying some of our salespeople should be too tired to give you a smile, may we ask you to leave one of yours?

For 은 전치사로도 쓰일 수 있고, 접속사로도 쓰일 수 있다. 이 경우, 첫번째 문장에서는 접속사로 쓰인 경우이다.