The document provides examples of sentences in the present perfect tense both positively and negatively, as well as examples of yes/no and wh- questions in the present perfect tense. Some of the examples involve common actions like studying, eating, going places, reading, living somewhere, knowing someone, losing items, drinking, missing transportation, having meals, writing, finding things, trying activities, passing exams, not going places, seeing things, meeting people, visiting places, knowing how long, hurting oneself, leaving items, losing tickets, making food, arriving, doing homework, living in places, buying food, visiting places, going to locations, studying a language, and buying food.