The idea of the passive

In an active sentence, the person or thing does the action. In a passive sentence, we focus on the thing that receives the action.

• The bottles are made from glass.
• The old bridge was built in 1920.

Present passive form

Use am/is/are + past participle: The tea is packaged in boxes.

subject + am/is/are + past participle

• The bottles are made from glass.
• The old bridge was built in 1920.