✔ 最佳答案
There are 12 tenses in Collins Cobuild Grammar Patterns Verbs to help you with Real English.
Your tense have had v.+ing may be the "see" group.These verbs are concerned with perceiving, finding, or showing someone doing something."It is called had been concerning group"=Your "have had v.+ing" group.
eg:-The police had been entering and leaving the house with....
-----Thieves had been observed entering and leaving the house with.....
The subject usually indicates a human being,but the verbs see and show sometimes have inanimate Subjects:-
eg:-The next day had been seeing us cruising down endless,cactus-lined roads with vultures circling overhead.
It might be called "Past Perfect Continuous Tense."
2012-07-14 00:38:26 補充:
Past perfect Continuous Tense is formed by had been+present participle
(1)To express the duration of an action up to a certain time in the past,eg:-
---Thieves had been plundering for an hour before police arrived.
---When I reached Mexico country,they had been cruising,circling for an hour.
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