내일 비가 올 것 같아서 걱정이야.I am concerned that it might rain tomorrow.

http://www.youtube.com/watch?v=U-Uku_83K1E

내일 비가 올 것 같아서 걱정이야.I am concerned that it might rain tomorrow.
그러게 말이야. 날씨가 좋아야 할 텐데.I agree with you (strongly). I'm hoping for good weather (it should be good)
사람들이 좋아해야 할 텐데.I was hoping people would like it.
잘 될 거야.Everything will turn out ok.