Search the list Add your own study to the list Web-Lab Publications archived Perception :: 21. 02. 2004 :: :: The Present Perfect in English   Katrin Voigt Chemnitz University of Technology, Germany   People say: English has no grammar! I wonder why so many learners find the present perfect extremely difficult. I am interested in finding better ways to explain the present perfect. In this experiment the participant can a) test his knowledge of the present perfect, or b) learn a few interesting details about the present perfect. Experiment created on a workshop by U. Reips on Internet-based experimenting