#1.It never snows where I live.
I can't understand a structure of the sentence above. I don't now whether it is an adverb relative clause or a nominal relative clause. Whatever it is, I think it needs something before where clause ; an antecedent or a preposition. Otherwise, Would 'where clause' function itself an adverb in the sentence?
Or Do I have to understand the structure of the sentence like the following.
#2.Where I live, It never snows.
#3.When I had lived, It never snowed.
So, do all # 1,2 and 3 have the same structure?