Match each base form to its past simple form.

Explication

This past-simple set combines 3 verbs using separate changes for past and participle, 2 verbs using one shared past-and-participle pattern, and 1 verb using a shared past-and-participle pattern with accepted spelling variants. Each verb's irregular family controls the past-simple result; a similar-looking form from another family is not a spelling rule; the dominant class is separate changes for past and participle (3 of 6), with 3 pattern classes represented.