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Handlungen auszudrücken, die in der Vergangenheit begonnen haben und bis jetzt andauern oder deren Ergebnisse jetzt relevant sind.Erfahrungen zu beschreiben, ohne einen spezifischen Zeitpunkt anzugeben.Handlungen, die bis jetzt (oft mit 'already', 'yet', 'ever', 'never') abgeschlossen wurden.
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