Select the option that expresses the given sentence in active voice.
The entire syllabus will have been revised by the students before the pre-board exams.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → The students will have revised the entire syllabus before the pre-board exams.
Active form of the future perfect passive:
| Change | Passive | Active | Why |
|---|---|---|---|
| Doer becomes subject | by the students | The students | The students do the revising, so they become the subject. |
| Tense kept | will have been revised | will have revised | “Will have been revised” is the future perfect passive, so the active stays in the future perfect: will have + past participle (V3). Only “been” goes. |
| Subject becomes object | The entire syllabus | the entire syllabus (after the verb) | The syllabus receives the action, so it goes after “will have revised”. |
| Full sentence | The entire syllabus will have been revised by the students before the pre-board exams. | The students will have revised the entire syllabus before the pre-board exams. |
Other future perfect passives change back the same way: will have been + V3 → will have + V3. Example: The hall will have been booked by Mama before Diwali. → Mama will have booked the hall before Diwali.
Why the Other Options are Incorrect?
Option 2: The students will revise the entire syllabus before the pre-board exams. — Incorrect. “Will revise” is the simple future. With “have” dropped, the idea of the work being finished before the exams is lost.
Option 3: The students will have been revising the entire syllabus before the pre-board exams. — Incorrect. “Will have been revising” is the future perfect continuous. It shows work still going on, not work that is finished.
Option 4: The students had revised the entire syllabus before the pre-board exams. — Incorrect. “Had revised” is the past perfect. The passive “will have been revised” is about the future.