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This tense can be used only with action verbs. For state verbs use
the Present Perfect Tense.
I have been here for an hour.
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To indicate that the activity has ended, use the Present Perfect
Tense.
John has painted his house.
4.2 Repeated atomic actions continuing for some time
Use this tense to talk about actions happening repeatedly for some time
up to the present moment. The actions taken together can be thought of
as a continuous activity.
She has been winking at you for some time now.
John has been trying to talk to you since Monday.
They have been throwing dice for hours.
4.3 Past activities with present giveaway results
Use this tense for activities that took place some time ago. There is
usually some present evidence of the past activity, which makes it
possible to guess that the activity took place.
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