谁能简单说说had been doing和have been doing的区别。最好举个例子。谢谢

现在完成进行时过去完成进行时。。区别在哪呀

推荐答案 2010-05-03

had been doing与have been doing都是过去正在进行时。
只不过前者用在虚拟语气中
而后者用于现实语句中。
比如：what have you doing when I called you yesterday？
回答是：I have been doing my homework.
如果问题是：Have you finished your homework?the teacher is coming for checking.
回答是：I should had been doing my homework when Jake had asked me to play basketball yesterday.

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其他回答

第1个回答 2010-05-03

是否有一个明确的时间点作对比，或者此时间点从上下文中可以推测出来。例如：1'I have been cleaning the room all the morning.
2'I had been cleaning the room all the morning when she came.
此处，when she come 就相当于一个时间点。本回答被提问者采纳

第2个回答 2010-05-03

had been doing是过去完成进行时
have been doing是现在完成进行时

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