Match each base form to its past participle.

Explication

These past-participle matches draw on 4 verbs using one shared past-and-participle pattern, 1 verb using an unchanged three-form pattern, and 1 verb using separate changes for past and participle. Use the stored irregular class for the participle: neither an -ed default nor a nearby past-tense shape proves the match; the dominant class is one shared past-and-participle pattern (4 of 6), with 3 pattern classes represented.