He asked Lucy,"Where did you go?"——He asked Lucy where she went

这是一个宾语从句,谓语asked是过去式,从句时态也要用过去式但是有一道题："Why did you lock the door？“Dad said to Amy.这个句子的改法是：Dad asked Amy why she had locked the door.求讲用的语法不一样，你说的这个因为从句使用了完成时，爸爸“问”这个动作发生在锁门之后，所以用过去完成时。你问题那个从句没用这个语法，用的只是从句陈述句时态和主句一致。 意思都一样。