Multiple choice

Directions: Change the voice.

They had made a mistake.

  1. A mistake had been made by them.

  2. A mistake was made by them.

  3. Mistakes are made by them

  4. A mistake is made by them.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The original sentence is in the past perfect tense. The passive form is 'had been' + past participle.