现在完成进行时和现在完成时的比较
1)现在完成时所表示的动作，到现在为止已经完成；现在完成进行时往往表示动作仍然继续下去。如：
I have been reading Lu Xun this week.本周我一直在读鲁迅的著作。(我仍然在读。)
I have read A Madman is Diary this week.我本周读了《狂人日记》。(我本周开始读而且已经读完它了。)
I have read The story of Ah Q before.我以前读过《阿Q正传》。(过去经历)
2)现在完成时强调动作的最后结果；现在完成进行时则强调动作的直接结果。如：
Now we have cleaned the room，we can move the things in.房间已打扫过了，我们可以把东西搬进去了。(强调最终结果)You look so tired. What have you been doing? 你看来很累的样子，你干什么来着?(强调直接结果)
过去完成进行时(past perfect continuous tense)
1)过去完成进行时的形式一律为had been + 现在分词，无人称和数的区别。
2)过去完成进行时的用法 过去完成进行时表示动作在过去某一时间之前开始并延续到过去这个时间，这一动作可能还在进行，也可能已经停止。如：
He told me that he had been waiting for me for two hours.他对我说他等了我两小时。(动作不再延续)
The baby had been crying for fifteen minutes when her mother came in.妈妈进来时，婴儿一直哭了十五分钟。(动作可能还在进行)
It seemed to her that the boys had been shouting for a long time.她似乎觉得这些男孩一直叫喊了很久。(动作可能还在进行)
The teacher had been teaching for forty years by the time he retired，这位教师退休前一直教了四十年的书。(动作不再进行)