Which of the following options is the most suitable conversion of the following sentence into Passive Voice?
They have built a new library in the town.
Show answer & explanation
Correct answer: A
Explanation
Correct Answer
A new library has been built in the town by them.
Explanation
The original active sentence ("They have built...") is structured in the present perfect tense. When converting an active sentence into the passive voice, the core grammatical tense must always remain exactly the same. The mathematical formula for transforming a present perfect active verb into its passive counterpart is:
Because the new object, "a new library," is singular, it pairs with "has been built."
The other options are incorrect because they completely alter the timeline of the action. Option 2 changes the sentence into the simple present tense ("is built"). Option 3 changes it into the simple past tense ("was built"). Option 4 shifts it entirely into the future tense ("will be built").
Key Points
A gold standard rule for active-to-passive conversions is that you never change the temporal tense of the baseline sentence. Identify the auxiliary verb immediately—here, "have built" tells you it is present perfect, meaning your correct answer choice must absolutely contain the passive flag "been."