Question

change this sentence active into passive voice

they sell cars

Answer 1

cars are sold by them

Answer 2

Cars are sold by them .

Voice is that the transitive verb that shows whether the subject of the sentence is the door of the action or has the action done to it.

Eg : Mohan played football . (Active Voice)

=> Football was played by Mohan . (Passive Voice)

Rules for changing of voice :

1) The object of the active sentence becomes the subject of the verb in the passive voice.

2) Use helping verb according to the tense.

3) The main verb of the active sentence changes into the past participle.

4) The preposition by is used before the object.

5) And some change into pronouns.