1. The classroom was being cleaned when we arrived.

2. The traffic was being diverted while road works was being done.

3. Cars were being burned by the demonstration.

4. The floor was wet because it was being washed.

5. The students were being encouraged to work harder.

6. The new students were being shown round the school by the serious.

7. Too much time was being waited.

8. The cat wa sbeing chased by the dog.

9. All the tigs were being eaten by birds.

10. Money was being wasted on extraagant projects.

11. The rubbish bins weren't being emptied.

12. The empty building was being occupied by homeless people.

`1.` The classroom was being cleaned when we arrived.

`2.` The traffic was being diverted while road works was being done.

`3.` Cars were being burned by the demonstration.

`4.` The floor was wet because it was being washed.

`5.` The students were being encouraged to work harder.

`6.` The new students were being shown round the school by the serious.

`7.` Too much time was being waited.

`8.` The cat wa sbeing chased by the dog.

`9. `All the tigs were being eaten by birds.

`10.` Money was being wasted on extraagant projects.

`11. `The rubbish bins weren't being emptied.

`12. `The empty building was being occupied by homeless people.

Cấu trúc câu bị động thì quá khứ tiếp diễn: 

S +was/were + being + VpII + (by +...) + O