The structure of the passive voice is very simple:
subject + form of "to be" (is or are) + main verb (past participle)
The main verb is always in its past participle form.
Look at these examples:
|subject||auxiliary verb (to be)||main verb (past participle)|
|100 people||are||employed||by this company.|
We use the passive when:
- we want to make the active object more important
- we do not know the active subject
What questions do you have?