Table of tenses for passive voice

http://www.studyandexam.com/passive-voice-for-tense.html


Active or passive

http://www.englishclub.com/grammar/verbs-voice_quiz.htm
Passive voice

http://www.usingenglish.com/quizzes/46.html

http://www.learnenglishfeelgood.com/esl-passive-voice-exercise2.html