must have + 过去分词是对过去事情的推测,因为去意大利渡假是发生在去年的事情,所以是对过去的推测,那一定很好.
希望能帮到你,祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)
we went to Italy for a holiday last year. That must have been nice. 问题：为什么用must have been
we went to Italy for a holiday last year. That must have been nice. 问题：为什么用must have been
为什么不用must be?
为什么不用must be?
英语人气：918 ℃时间：2019-08-21 17:40:08
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