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Can we use past perfect progressive in the context where present tense is predominantly used?

As I understand, past perfect is used to express an action that had happened before something else in the past. But in the paragraph I came across, there appeared past perfect progressive in the ...
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Present perfect continuous

How are we to understand whether present perfect progressive implies that the action is still in progress, versus implying it has stopped just now or recently? In simple sentences like these two, ...