简单地说：过去完成时就是过去的过去。要用过去完成时，必须先有一个条件：过去。这个过去可以是从句，也可以是时间状语，也可以是上下文。如By the end of last year过去, I had finished过去的过去 reading twenty novels.He had come过去的过去 in the room when I arrived过去.They got up过去 very early this morning. But I had got up过去的过去 even earlier.
