Wortino

passen: haben or sein? Perfect tense: hat gepasst

In English: to fit, suit, match; (as 'aufpassen') to look after, watch · A1

The answer

In the Perfekt, passen takes: haben

Perfekt auxiliary
haben
Partizip II
gepasst
Perfekt
hat gepasst

Wortino stores one auxiliary per verb; some verbs can take both depending on the meaning.

More

Study it with cards

Wortino turns verbs into flashcards with spaced repetition: a word you struggle with comes back soon, one you know comes back less often.