Theory

2. • We do not know who did the action
Example: My bike was stolen
• The recreiver of the action is more important
Example: The pyramids were built nearly 5000 year ago

3. • ACTIVE VOICE
Example: John painted the house last week
Subject / Verb / Object
• PASSIVE VOICE
Example: The house was painted the last week by John
Object Verb Subject
Object (sujeto) + Verb be + past participle

4. • Verb be
• Present: am – is - are
• Past: was – were
• Future: will be
• Present perfect: have been