Choose the correct passive voice transformation of the sentence:
You should have kept us informed about the progress of the investigation.
Show answer & explanation
Correct answer: B
Explanation
The original sentence is in the active voice using the structure: subject (You) + should have + past participle (kept) + object (us) + compliment (informed...). To transform this into the passive voice, the object ('us') becomes the subject ('We'), followed by 'should have been' and the past participle of the verb ('kept').