Answer:
1. Linda is taken to school everyday by him.
2. The shops were not closed last Saturday by them.
3. The dog is walked by Mike everyday.
4. Every competition is won by Michael.
5. New things were invented years ago by people.
6. The breakfast is prepared by my mother everyday.
7. School uniforms were not worn by us in this school.
8. His money was kept in a safe place by him for a long time.
9. News shoes are bought by my brother every year.
10. Delicious candies were sold by Mark in his store.
Explanation:
The use of the "by" agent in sentence construction is also known as the passive voice of sentence writing. The passive voice is a grammatical voice construction where the person or thing on which the action/ verb is acted on comes first in the sentence. An active voice starts the sentence with the doer of the action while the passive voice starts the sentence with the receiver of the action. And in the passive voice, the subject-verb agreement will be according to the tense of the original sentence.
Thus, the new sentences with the "by" agent are as follows-
1. Linda is taken to school everyday by him.
2. The shops were not closed last Saturday by them.
3. The dog is walked by Mike everyday.
4. Every competition is won by Michael.
5. New things were invented years ago by people.
6. The breakfast is prepared by my mother everyday.
7. School uniforms were not worn by us in this school.
8. His money was kept in a safe place by him for a long time.
9. News shoes are bought by my brother every year.
10. Delicious candies were sold by Mark in his store.
