Let's take a look at how to make continuous passive sentences.
First of all, let's look an example active sentence:
'The workers are painting the bridge.'
In the above sentence:
The workers are the subject.
are painting is the present continuous verb.
the bridge is the object.
To make a present continuous passive sentence the object (the bridge) comes first:
'The bridge is being painted.'
This is how the present continuous passive is formed:
Object (The bridge) + 'to be' verb (is) + being + past participle (painted)
In passive sentences the subject is not always needed; however, if you want to include it the sentence becomes:
'The bridge is being painted by the workers.'
We can change this sentence into the past continuous passive like this:
Active - 'The workers were painting the bridge.'
Past Continuous Passive - 'The bridge was being painted by the workers.'
Let's take a look at some more examples:
Present Continuous Passive - 'My car is being fixed.'
Past Continuous Passive - 'My car was being fixed.'
Present Continuous Passive - 'The meeting is being held in my office.'
Past Continuous Passive - 'The meeting was being held in my office.'