PASSIVE VOICE

The passive voice is a grammatical construction (a "voice") in which the subject of a sentence or clause denotes the recipient of the action (the patient) rather than the performer (the agent). In the English language, the English passive voice is formed with an auxiliary verb (usually be or get) plus a participle (usually the past participle) of a transitive verb.
Passive voice is a pattern in  whichthe subject receives the action pattern : 

• Simple present tense : Subject + is/am/are + verb3 
• Simple past tense : Subject + was/were +verb3
• Present continuous tense : Subject + is/am/are + being + verb3
• Past continuous tense : Subject + was/were + being + verb3
• Present perfect tense : Subject + has/have + been + verb3
• Past perfect tense : Subject + had + been + verb3
• Modal : Subject + modal + be + verb3