Tense

1. Simple Present Tense
Active                                                         Passive
S + V1/ Vs/es + Object                              S + am, are, is + V3 + (by) + Obj
She writes a letter                                       A letter is written by her

2. Simple Past Tense
Active                                                         Passive
S + V2 + O                                                 S + was, were + V3 + (by) + O
She wrote a letter                                        A letter was written by her

3. Present Continuous Tense
S + am, are, is + V-ing + O                         S+ am, are, is + being + V3 + (by) + O
She is writing a letter now                            A letter is being written by her

4. Past Continuous Tense
S + was, were + V-ing + O                         S + was, were + being + V3 + (by) + O
She was writing many letters                        Many letters were being written by her

5. Present Perfect Tense
S + have, has + V3 + O                              S + have, has + been + V3 + (by) + O
She has written some letters                         Some letters have been written by her

6. Past Perfect Tense
S + had + V3 + O                                       S + had + been + V3 + (by) + O
She had written a letter                                A letter had been written by her

7. Present Future Tense
S + will + V1 + O                                      S + will + be + V3 + (by) + O
She will write a letter                                  A letter will be written by her

8. Past Future Tense
Active Passive
S + would + V1 + O                                  S + would + be + V3 + (by) + O
She would write a letter                              A letter would be written by her

9. Present Perfect Continuous Tense
S + have, has + been + V-ing + O             S + have, has + been + being + V3 + (by) + O
She has been writing some letters               Some letters have been being written by her

10. Past Perfect Continuous Tense
S + had + been + V-ing + O                     S + had + been + being + V3 + (by) + O
She had been writing some letters              Some letters had been being written by her

11. Present Future Continuous Tense
S + will + be + V-ing + O                         S + will + be + being + V3 + (by) + O
She will be writing a letter                         A letter will be being written by her

12. Past Future Continuous Tense
S + would + be + V-ing + O                    S + would+ be + being + V3 + (by) + O
She would be writing a letter                     A letter would be being written by her

13. Present Future Perfect Tense
S + will + have + V3 + O                         S + will + have + been + V3 + (by) + O
She will have written a letter                     A letter will have been written by her

14. Past Future Perfect Tense
S + would + have + V3 + O                    S + would + have + been + V3 + (by) + O
She would have written a letter                A letter would have been written by her

15. Past Future Perfect Continuous Tense
Active Passive
S + will + have + been + V-ing + O        S + will + have + been + being + V3 + (by) + O
She will have been writing a letter           A letter will have been being written by her

16. Past Future Perfect Continuous Tense
S + would + have + been + V-ing + O   S + would + have + been + being + V3 + (by) + O
She would have been writing a letter       A letter would have been being written by her

Addition
MODALS + BE + V3
Example:
The book can be bought at the book store
The exercise can be done by the students
These announcement will be announced tomorrow