Choose the most appropriate passive construction of the given sentence:
Someone might have taken your umbrella from the staff room by mistake.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Your umbrella might have been taken from the staff room by mistake.
Passive of “might have” + past participle (V3):
| Change | Active | Passive | Why |
|---|---|---|---|
| Object becomes subject | your umbrella | Your umbrella | The umbrella receives the action, so it becomes the subject. |
| “Might have” kept | might have taken | might have been taken | “Might have taken” is a guess about the past. The passive keeps “might have” and adds “been”: might have been + past participle (V3). |
| Agent dropped | Someone | (no “by someone”) | “Someone” does not tell us who did it, so “by someone” is left out. |
| Full sentence | Someone might have taken your umbrella from the staff room by mistake. | Your umbrella might have been taken from the staff room by mistake. |
“Could have” and “must have” work the same way: modal + have + V3 → modal + have been + V3. Example: The wind must have blown the kite away. → The kite must have been blown away by the wind.
Why the Other Options are Incorrect?
Option 1: Your umbrella might be taken from the staff room by mistake. — Incorrect. “Might be taken” talks about now or later. The active “might have taken” is about the past.
Option 3: Your umbrella might have taken from the staff room by mistake. — Incorrect. “Been” is missing. Without it, the umbrella becomes the one that took something.
Option 4: Your umbrella might had been taken from the staff room by mistake. — Incorrect. A modal like “might” is always followed by “have”, never “had”.