had been doing是什么是时态?

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had been doing是什么是时态?
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had been doing是什么是时态?
had been doing是什么是时态?

had been doing是什么是时态?
这是过去完成进行时
表示从过去的某一个时间点开始做某事一直持续到过去的某个时间点并且仍在执行.

过去曾一直做某事

过去完成进行式

过去完成进行时,表示“过去某段时期内在从事某事/做某事”

我这有16种。
一般现在时：do
一般过去时：did
一般将来时：will do
一般过去将来时: would do
现在进行时：is(am,are)doing
过去进行时：was (were)doing
将来进行时：will be doing
过去将来进行时：would be doing
现在完成时：hav...

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我这有16种。
一般现在时：do
一般过去时：did
一般将来时：will do
一般过去将来时: would do
现在进行时：is(am,are)doing
过去进行时：was (were)doing
将来进行时：will be doing
过去将来进行时：would be doing
现在完成时：have(has)done
过去完成时：had done
将来完成时：will have done
过去将来完成时：would have done
现在完成进行时： have（has）been doing
过去完成进行时：had been doing
将来完成进行时：will have been doing
过去将来完成进行时：would have been doing
以上，希望对你有帮助。

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过去完成进行时

过去完成进行时啊

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