1 His dog is fed by him twice a day.
2 The dishes are often washed by her after meals, aren't they?
3 The vase was not broken by the boy yesterday.
1, He feeds his dog everyday.
-> His dogs are fed by the everyday.
2, Does she often wash the dishes after meals?
-> The dishes are often washed by her after meals,aren't they?
3, We didn't break the vase yesterday.
-> The vase was not broken by us yesterday
1, He feeds his dog everyday.
-> His dog is fed everyday by him.
2, Does she often wash the dishes after meals?
-> The dishes are often washed after meals (by her), aren't they?
3, We didn't break the vase yesterday
-> The vase wasn't broken (by us) yesterday.