ACTIVE OR PASSIVE?

PRESENT:

http://www.englisch-hilfen.de/en/exercises/active_passive/sentences_simple_present.htm

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

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present-2

PAST:

http://www.englisch-hilfen.de/en/exercises/active_passive/sentences_simple_past.htm

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?02

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-past

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-past-2

FUTURE :

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?04

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?future-1

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?future-will-2