The passive voice with past continuous 1.they were cleaning the classroom when we arrived. 2.they were diverting the traffic while they were doing road works. 3.the demonstrators were burning cars 4.the floor was wet because they were washing it. 5.they were encouraging the students to work harder. 6.the seniors were showing the new students round the school. 7.they were wasting too much time. 8.the dog was chasing the cat. 9.birds were eating all the figs. 10.they were wasting money on extravagant projects. 11.nobody was emptying the rubbish bins. 12.homeless people were occupying the empty building.

1. The classroom was being cleaned by them when we arrived.
- In this sentence, the subject "they" is performing the action of cleaning the classroom. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "the classroom" while "were cleaning" becomes "was being cleaned."
- The verb "arrived" remains the same as it does not need to be changed in the passive voice.

2. The traffic was being diverted by them while road works were being done.
- In this sentence, the subject "they" is diverting the traffic while road works are being done. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "the traffic" while "were diverting" becomes "was being diverted."
- The phrase "while they were doing road works" becomes "while road works were being done."

3. Cars were being burned by the demonstrators.
- In this sentence, the subject "the demonstrators" are burning cars. In the passive voice, the subject becomes the receiver of the action. Therefore, "the demonstrators" becomes "cars" while "were burning" becomes "were being burned."

4. The floor was wet because it was being washed by them.
- In this sentence, the subject "they" is washing the floor. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "the floor" while "were washing" becomes "was being washed."
- The phrase "because they were washing it" becomes "because it was being washed by them."

5. The students were being encouraged to work harder by them.
- In this sentence, the subject "they" are encouraging the students. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "the students" while "were encouraging" becomes "were being encouraged to."

6. The new students were being shown round the school by the seniors.
- In this sentence, the subject "the seniors" are showing the new students round the school. In the passive voice, the subject becomes the receiver of the action. Therefore, "the seniors" becomes "the new students" while "were showing" becomes "were being shown round."

7. Too much time was being wasted by them.
- In this sentence, the subject "they" are wasting too much time. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "too much time" while "were wasting" becomes "was being wasted."

8. The cat was being chased by the dog.
- In this sentence, the subject "the dog" is chasing the cat. In the passive voice, the subject becomes the receiver of the action. Therefore, "the dog" becomes "the cat" while "was chasing" becomes "was being chased."

9. All the figs were being eaten by the birds.
- In this sentence, the subject "birds" are eating all the figs. In the passive voice, the subject becomes the receiver of the action. Therefore, "birds" becomes "the figs" while "were eating" becomes "were being eaten."

10. Money was being wasted on extravagant projects by them.
- In this sentence, the subject "they" are wasting money on extravagant projects. In the passive voice, the subject becomes the receiver of the action. Therefore, "they" becomes "money" while "were wasting" becomes "was being wasted on."

11. The rubbish bins were not being emptied by anybody.
- In this sentence, the subject "nobody" is not emptying the rubbish bins. In the passive voice, the subject becomes the receiver of the action. Therefore, "nobody" becomes "the rubbish bins" while "was not emptying" becomes "were not being emptied by."

12. The empty building was being occupied by homeless people.
- In this sentence, the subject "homeless people" are occupying the empty building. In the passive voice, the subject becomes the receiver of the action. Therefore, "homeless people" becomes "the empty building" while "were occupying" becomes "was being occupied by."