Voice is the verb form that shows the relation of subject to action in a sentence. When the subject of the verb does something, the verb is in Active Voice, when something is done to the subject, the verb is in Passive Voice.
Rekha reads a mail. (Active Voice)
A mail is read by Rekha. (Passive Voice)
RULES FOR CHANGING VOICE
A sentence in the active voice can be changed into passive voice by making the following changes:
1. The object of the verb in Active Voice is changed into subject in the Passive Voice.
2. The subject in the Active Voice becomes the object in the Passive Voice and it generally takes the prepositions by before it.
3. The verb in the Active Voice is changed into past participle in the Passive Voice and it takes the verb to be in one of its forms depending upon the tense of the Active Voice.
While changing sentences from Active Voice to Passive Voice we need to be careful about the use of personal pronouns; e.g.;
Let’s learn them:
|Subject in the Active Voice||Object in the Passive Voice||Subject in the Active Voice||Object in the Passive Voice|
|Tense||Active Voice||Passive Voice|
|Simple Present||teach/ teaches||am/ is/ are/ taught|
|Simple Past||taught||was/ were/ taught|
|Simple Future||shall/ will/ teach||shall/ will be taught|
|Present Continuous||am/ is/ are teaching||am/ is/ are being taught|
|Past Continuous||was/ were teaching||was/ were being taught|
|Present Perfect||has/ have taught||has/ have been taught|
|Past Perfect||had taught||had been taught|
|Modals||may/ might/ can/ could etc. teach||may/ might/ can/ could etc. be taught|