Convert the following sentence from passive voice to active voice: The documents had been submitted by the assistant before the deadline.

The assistant submits the documents before the deadline.
The assistant had submitted the documents before the deadline.
The assistant was submitting the documents before the deadline.
The assistant is submitting the documents before the deadline.

Correct answer: The assistant had submitted the documents before the deadline.

Solution

In the passive sentence, "the documents" receive the action and "the assistant" performs it. Since the tense is past perfect passive, the active voice becomes past perfect active: "had submitted."

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