Out of the given options, choose the one which is the correct active voice of the sentence given below.

The assignment had not been completed by me.

The correct answer is "​I had not completed the assignment."

Key Points

• The above question is an example of past perfect tense.
• The structure of this kind of sentence is ;- 
  • Active: Subject + had + not + v3 + object
  • Passive: Sub(objective case) + had + not + been + v3 + by + Object (subjective case).
• So, as per the above structure, the correct active form of the given passive sentence is "I had not completed the assignment."

Correct answer: I had not completed the assignment.