Have (not) / has (not) + past participle (voltooid deelwoord)
Regular verbs:
Regular verbs have the same rules of formation as the ‘past simple’.
Irregular verbs
Irregular verbs have their own form for the present perfect.
On p. 64-66 in Checkbook: list with irregular verbs à third column
He has written a book.
I have been here since breakfast.