Match each base form to its past participle.

Explication

This past-participle set combines 4 verbs using one shared past-and-participle pattern, and 2 verbs using an unchanged three-form pattern. Each verb's irregular family controls the participle result; a past-tense lookalike is not enough unless that family shares the forms; the dominant class is one shared past-and-participle pattern (4 of 6), with 2 pattern classes represented.