PASSIVE

STEP 1: http://www.learnenglishfeelgood.com/esl-passive-voice-exercise2.html

http://www.learnenglishfeelgood.com/esl-passive-voice-exercise3.html


STEP 2: http://www.ego4u.com/en/cram-up/grammar/passive


STEP 3: http://www.eltbase.com/vtr_refs.php?id=18