what is passive tense
The passive voice is a grammatical construction (specifically, a voice). The noun or noun phrase that would be the object of an active sentence (such as Our troops defeated the enemy) appears as the subject of a sentence with passive voice (e.g. The enemy was defeated by our troops). sentence featuring the passive voice is sometimes called a passive sentence, and a verb phrase in passive voice is sometimes called a passive verb. English allows a number of passive constructions which are not possible in many of the other languages with similar passive formation.