present perfect simple:- actions in the past that are still relevant for the present: I have lost my keys (focus on the result: you can't get into the house)
- to talk about experiences: I have been to China twice
- ezelsbruggetje: BAH FYNE JASS
before, already, how long, for, yet, never, ever, just,
always, since, so far
present perfect continuous:
- actions in the past that are still relevant for the present: I have been learning how to drive for two months now (focus on the action) --> you want to emphasize the length of an action and the fact that it’s still in progress