Where had it come from?

where had it come from假如是过去完成时态的话,不应该是where had it came from where come from对吗? Where come from...歌词 from it where come does（连词成句） where does the milk come from? It comes from_____________ 英语 where does the milk come from?It comes from_____________ 英语, Where does the rain come from?It comes from the clouds.Where but where does it all come from?请问where后为什么有does 1.Where does the rain come from?It comes from the clouds. B:It _____ from the_____, A:And where does the____,come from 英语翻译重点是改写!以下是原文：Where does the rain come from?It comes from 用where does the ____ come from?It comes from the ____.造句