Voice:-  Voice is that form of the verb which shows whether the subject does the activity or has the activity been done to the subject.

Kinds of Voice:- 

Active Voice:- A verb is said to be in the active voice when its form shows that the person or thing denoted as the subject does the activity.

Ex:- The peon opened the gate. 

Passive Voice:- A verb is said to be in the passive voice when its the form shows that the activity is done to the person or thing denoted as the subject.

Ex:- The gate was opened by the peon.

Conversion of Active into Passive Voice:- 

Step1:- Use the subject of the Active Voice as the object and the object of the Active Voice as the subject.

Step2:- Always use the third form of the verb in the passive voice.

Step3:- Put preposition 'by' after the third form of the verb.

Step4:- Helping verbs in the passive voice:-

• Present Indefinite Tense-is/am/are
• Present Continuous Tense-is/am/ are+ being
• Present Perfect Tense-has/have + been
• Past Indefinite Tense-was/were
• Past Continuous Tense- was/were + being
• Past Perfect Tense-had +been
• Future Indefinite Tense-will/shall+ be
• Future Perfect Tense-willshall. + have been

Change the subject of the Active Voice into the object of the pronoun:-

Ex:-

I	me
We	us
You	you
They	them
He	him
She	her
Who	by  whom

Note:-  The passive form of the Future Continuous Tense and Perfect Continuous Tense is not used.