Present perfect simple: whole-life experience (in the past but no time specified), just, yet, already, finished action (no time specified) with present results, I-------→ (something started in the past and is still true now) (non-action verbs), how much/many have we done, superlatives, focus on results , Present perfect continuous: I-------→ (something started in the past and is still true now) (action verbs), repeated actions (with "all day", "recently"), evidence: unfinished actions which have just been interrupted, how long have we been doing it, focus on activity (duration),

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