1.Somebody calls the president once a week

- The president is called once a week.

2.Weeds cover the riverbank

- The riverbank is covered by the weeds.

3.They use milk for making butter and cheese

- Milk is used for making butter and cheese.

3.People spend a lot of money on advertising everyday

- A lot of money is spent on advertising everday.

4.The police easily captured the thief

- The thief was easily captured by the police.

5.Somke filled the room

- The room was filled by somke.

6. Mr.Smith saw the accident yesterday

- The accident was seen by Mr.Smith yesterday.

7.The company is developing a new procedure

- A new proeduce is being developed by the company.

8. My father is washing the car

- The car is being washed by my father.

9. Mary is cutting the cake with sharp knife.

- The cake is being cut with sharp knife by Mary.

10.The chef engineer was instructing all the worker of the plant

- All the worker of the plant was being instructed by the chef engineer.

11.We were painting the gate

- The gate were being painted.

12.Someone was feeding the dog

- The dog was being fed.

13.Beth has finished the report

- The report has been finished by Beth.

14.Somebody has taken my briefcase

- My briefcase has been taken.

15.No one has finished the report at noon

- The report has not been finished at noon.

16.They have not read the book

- The book has not been read.

17.Mark had written nothing

- Nothing had been written by Mark.

18.No one had submitted the report

- The report had not been submitted.

19. Barbara will eat the cake

- The cake will be eaten by Barbara.

20.They will not ask him

- He will be not asked.

21.My mother is going to sell this house

- This house is going to be sold by my mother.

22.Nobody are going to decorate the room next week

- The room is not going to be decorated the next week.

23.You ought to water these plants once a week

- These plants ought to be watered once a week.

24.They may discuss the problems again

- The problem might be discussed again.

25.They can gain nothing without effort

- Nothing can be gained without effort. 

26.People must conserve natural resources

- Natural resources must be conserved.

1. I am called once a week 

2. The riverbank is covered by weeds