II. The Difference Between the Present Perfect Simple (PPS) and Continuous (PPC)
The first difference is action (PPC) vs result (PPS). Take a look at these two examples:
The first one focuses on the act of reading. The second focuses on 100 pages.
Both tenses are used to talk about actions that started in the past but continue in the present. We use PPC with continuous verbs and PPS with non-continuous verbs.