如何正确理解 had done、have done、have been doing 这 3 种时态？

理解这些如下文所示：

1、had done

美 [hæd dʌn] 

过去完成时

例句：I did not acknowledge that he had done anything wrong. 

我没有承认他犯了什么错。

2、have done

英 [hæv dʌn]   美 [hæv dʌn]  

现在完成时；所做的每一件事；表示做了不必做的事

例句：Any reasonable person would have done exactly as you did. 

任何有头脑的人都会完全照你那样去做的。

3、have been doing

英 [hæv biːn ˈduːɪŋ]   美 [hæv bɪn ˈduːɪŋ]  

现在完成进行时；现在完成进行时态；完成进行时态；现在完成进行；将来完成进行时

例句：The car must have been doing at least 100 miles an hour. 

这车速肯定每小时至少100英里。

短语：

have done harm 严重危害着

have done with 做完

have done a good job 干得真棒

have done hard exploration 进行了艰辛的探索

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