had been doing 和 had done的区别

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had been doing 和 had done的区别
had been doing 和 had done的区别

had been doing 和 had done的区别
had done 是过去完成时,指发生在早于过去某个时间的行为,该行为到那个时间业已结束.had been doing 是过去完成进行时,同样指发生在早于过去某个时间的行为,但这个行为到那个过去时间还在进行.

例如：

By He had done the work by ten o'clock this morning.到今天上午十点钟,他已完成了这项工作.

He had been doing the work by ten o'clock this morning. 到今天上午十点钟,他还在干着了这项工作.

He could remember a time when he had worked like that himself.他还能记得自己一度工作起来的那个样子

He could remember a time when he had been working like that himself.他还能记得自己当时一直在工作的那个样子.

had done是过去完成时
had been doing是过去完成的，但是到现在还在做的

..进步和健康

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