Passive voice

Passive voice is sentence that used when the focus or not know and however, who or what performing the action.
General Formula :
to be + V3 (Past participle)
- Formula active present tense :
1. Simple : S + V1 + O
Example : Elena writes a letter
2. Continuous : S + is/am/are-ing

Example : Elena is writing a letter
3. Perfect : S + have/has + V3
Example : Elena has written a letter
4. Perfect Continuous : S + have/has + been + V-ing
Example : Ratu has been writing a letter - Formula passive present tense :
1. Simple : S + is / am / are / + V3
Example : a letter is written by Elena
2. Continuous : S + is/am/are + being + V3
Example : a latter is being written by Elena
3. Perfect : S + have/has + been + V3
Example : a letter has been written by Elena
4. Perfect Continuous : S + have/has + been + V3
Example : a letter has been being written by Elena
- Formula active past tense :
1. Simple : S + V2 + O
Example : Elena wrote a letter
2. Continuous : S + was/were + V-ing
Example : Elena was writing a letter
3. Perfect : S + have/has + V3
Example : Elena has written a latter
4. Perfect Continuous : S + had+ been + V-ing
Example : Elena had been writing a letter
- Formula passive past tense :
1. Simple : S + was/were + V3
2. Continuous : S + was/were + being + V3
3. Perfect : S + has + been + V3
4. Perfect Continuous : S + had + been + being + V3
Sentence that used modals :
1) Active : We can solve the problem
Passive : The problem can solve
2) Active : They may open the hotel next year
Passive : The hotel may be opened next year
Kalimat dengan Complement atau Sub-Clause
1) Active : It is said that he is 108 year old
Passive : He is said to be old years old
2) Active : It is reported that two people were killed in the explosion
Passive : Two people are reported to have been killed in the explosion.