过去完成时：
By nine o’clock last night,we had got 200 pictures from the spaceship.
到昨晚9点钟,我们已经收到200 张飞船发来的图片.
I had been at the bus stop for 20 minutes when a bus finally came.
当车来的时候,我在车站已等了20分钟.
He said he had worked in that factory since 1949.
他说自从1949年以来他就在那家工厂工作.
现在完成进行时：
The Chinese have been making paper for two thousand years.
中国有2000年的造纸历史.（动作还将继续下去）
I have been learning English since three years ago.
自从三年前以来我一直在学英语. （动作还将继续下去）
We have been waiting for you for half an hour.
我们已经等你半个钟头了(人还没到,如同在电话里说的,还会继续等)