Choose the correct passive form of the given sentence:
Let the class monitors check the homework notebooks before the first period.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Let the homework notebooks be checked by the class monitors before the first period.
Passive of a “Let + person” sentence:
| Change | Active | Passive | Why |
|---|---|---|---|
| Let kept | Let | Let | The sentence begins with “Let”, so the passive also begins with “Let”. |
| Object comes after Let | the homework notebooks | the homework notebooks | The notebooks receive the action, so they come right after “Let”. |
| Verb made passive | check | be checked | After “Let” + the notebooks, the passive uses be + past participle (V3): “be checked”. |
| Agent (by ...) | the class monitors | by the class monitors | The class monitors will do the checking and are named, so they come after “by”. |
| Full sentence | Let the class monitors check the homework notebooks before the first period. | Let the homework notebooks be checked by the class monitors before the first period. |
Other “Let” sentences with a named doer change the same way. Example: Let her pack the lunch boxes. → Let the lunch boxes be packed by her.
Why the Other Options are Incorrect?
Option 2: Let the homework notebooks checked by the class monitors before the first period. — Incorrect. “Be” is missing before “checked”. After “Let” + the notebooks, the passive needs “be + V3”.
Option 3: Before the first period, the homework notebooks are checked by the class monitors. — Incorrect. “Are checked” only states a habit or a fact. The “Let” of the suggestion is lost.
Option 4: Let the homework notebooks being checked by the class monitors before the first period. — Incorrect. “Being” cannot follow “Let” + the notebooks. The plain form “be” is needed.