Present Perfect Continuous: to say how long for an activity that is still happening, actions continuing or repeated for a short time up until present, we are interested in the activity, Present Perfect Simple: we are interested in the result (for the completed actions), to talk about states rather than actions, to talk about something that happened once (or more than once) at an unspecified time in the past, to say how much/how many times,

Present Perfect: Continuous & Simple

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