题目内容：

That was the first time (that) I had been in Rome.为什么用过去完成时?
“第一次”和“到罗马”怎样体现出过去的过去?

优质解答

This is the first (second) time... + 现在完成时态
This was the ... time + 过去完成时态
这是一个固定句式.您只需要这么记住就可以了.