用过去完成时造几个简单的句子.
问题描述：
用过去完成时造几个简单的句子.
答
I had been at the bus stop for 20 minutes when a bus finally came.
By nine o’clock last night,we had gotten 200 pictures from the spaceship.
He said he had worked in that factory since 1949.
He said that he had known her well.