Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike

Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike: Tom mends his bike

The passive voice structure is be + past participle, so all kinds of tenses change to be, such as: general past tense: did into: was done past continuous tense: was / were doing --- was / were being done past perfect tense: had done --- had been done general present tense, do -