Your friend's hair is much shorter than when you last met.What do you say to her?为什么是:You had your hair cut?不是:You have your hair cut?

问题描述:

Your friend's hair is much shorter than when you last met.What do you say to her?
为什么是:You had your hair cut?
不是:You have your hair cut?

被动语态的过去式,也就是过去的过去.

过去式,用have的过去式had

因为have your hair cut “理发”该动作在问话的时候已经发生了啊,否则问她这个问题干嘛啊?
既然该动作已经发生,所以此句时态当然使用一般过去时,而不能使用一般现在时了.