Question

When will it stop raining? (positive or negative sentence?) Can i get the answer quickly?

Answer 1

I think its neither a positive nor negative sentence. Positive or negativeness exists only for assertive sentences. The given sentence is interrogative sentence.

Answer 2

" as well all know that the both positive or negative sentence only exist in the assertive sentence " 

therefore the given sentence is not positive nor negative. 

" it would be a interrogative sentence because we can observe that the sentence is in the questioner type  "