Question

my wife is to buy a scooter change voice​

Answer 1

A scooter is to be bought by my wife.

Answer 2

Active Voice refers to a sentence in which the subject is performing the action.

Passive Voice refers to a sentence in which the subject undergoes the action. In other words, it is writing the sentence in reverse order.

Example: She is playing a song. (Active)

               A song is being played by her. (Passive)

NOTE: Sentences that convey habitual actions cannot be changed to passive mode.

My wife is to buy a scooter. (Active)

A scooter is to be bought by my wife. (Passive)