What makes a sentence passive?

Related questions

1. What is a passive voice in grammar?
2. What is passive voice example?
3. How can you tell if a sentence is active or passive?
4. How do you identify passive sentences?
5. What are the rules of active and passive voice?
6. How do you fix passive voice examples?
7. Which verbs can be passive?
8. How do you correct passive voice?
9. What is the formula of passive voice?
10. What's wrong with passive voice?

Tags

1. #being
2. #active
3. #makes
4. #action
5. #doing
6. #acted
7. #subject
8. #voice
9. #example
10. #sentence
11. #however
12. #which
13. #explain
14. #passive