How to form:
present perfect simple / present perfect continuous
Present perfect simple:
I have watched the movie Titanic at least 25 times.
Have / has + past participle (voltooid deelwoord)
Focusses on a result
Present Perfect Continuous:
I have been watching Titanic for at least an hour now.
Have / has + been + verb+ing
Focusses on a period of time