Steps on how to change the sentence from active voice to pasdve voice.
Step 1: Identify the subject, the verb, and the object (S-V-0).
Step 2: The object will become the subject.
Step 3: Put a suitable auxiliary verb or helping verb.
Step 4: Change the verb into past participle of the verb.
Step 5: Add the preposition "by".
Step 6: The subject will become the object.​