or
or
When did you buy the book? The correct passive voice of the sentence is..
When /Where /Why যুক্ত Active Sentence কে passive করতে হলে :
When/Where / Why + auxiliary verb + tense অনুযায়ী) + object + Verb এর participle + by + subject+?
Active : When did you buy the book?
Passive: When was the book bought by you?
