Your quick reference guide to Change of Voice (Active and Passive Voice) for competitive exams. Covers rules for converting active to passive voice (object becomes subject, change verb to past participle, add appropriate form of "to be", subject becomes agent with "by"), passive to active voice (subject becomes object, remove "by", change verb accordingly), tense-wise conversion rules (present simple, present continuous, present perfect, past simple, past continuous, past perfect, future simple, future perfect), modal verbs conversion (can, could, may, might, should, must, ought to), imperative sentences conversion (commands, requests, advice), interrogative sentences conversion (questions starting with who/whom/which/what/where/when/why/how), sentences with two objects (direct and indirect object), impersonal passive (people say, believe, consider, think, know), verbs with prepositions, omission of agent (when unknown, obvious, or unimportant), and shortcut tricks for SSC, Banking, Railways, UPSC, CAT, and other competitive exams.