Raymond MurphyEnglish Grammar in UseCambridgePresent PerfectShe has painted her bedroom.Has painted is the present perfect simple.Here, the important thing is that somethinghas been finished. Has painted is a completedaction. We are interested in the result ofthe activity (the painted bedroom), not theactivity itself.Present Perfect ContinuousShe has been painting her bedroom.Has been painting is the present perfectcontinuous.We are thinking of the activity, it does notmatter whether it has been finished or not.In this example, the activity (painting thebedroom) has not been finished.