Choose the most appropriate option that converts the following sentence from Active to Passive voice:
Observe the bar graph to estimate the next stock market crash.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Let the bar graph be observed to estimate the next stock market crash.
Passive voice of an imperative sentence:
- An imperative sentence gives an order or instruction. Its passive form follows the pattern Let + object + be + past participle.
- Object becomes subject: the object the bar graph comes after "Let";
- Tense kept: the sentence stays an order; the verb "observe" becomes be observed;
- Agent (by ...): the doer is the listener, "you", who is understood, so no "by you" is added;
- the purpose phrase to estimate the next stock market crash stays as it is.
- This sentence: "Observe the bar graph ..." → "Let the bar graph be observed to estimate the next stock market crash."
Example: Shut the gate. → Let the gate be shut.
Why the Other Options are Incorrect?
Option 2: Should you not observe the bar graph to estimate the next stock market crash? — Incorrect.
- It turns the instruction into a question.
- The verb "observe" is still in the active voice.
Option 3: The bar graph will be observed to estimate the next stock market crash. — Incorrect. It is passive, but it is a statement about the future, not an instruction; the sense of a command is lost.
Option 4: The next stock market crash will be observed in the bar graph. — Incorrect. It changes the meaning: in the given sentence the bar graph is observed, not the crash.