Here's a worksheet about the typical mistakes that EFL students typically make on present perfect tense. It's written from my common mistakes corpus that has been gathered in years of my teaching.
Students aren't aware of their mistakes and make them naturally.
The set of mistakes is usually about forms of verbs or sentence making. When I use this worksheet in my lessons, my students usually ask me whether they are all correct or not. Quite often they tell me that some sentences look pretty reasonable to them. Students aren't aware of their mistakes most of the time. It'll be an excellent opportunity to show their typical errors.