The Passive: When, why, and how to use it - Part 1 - English Grammar

Easy practice
Another easy practice

Questions in passive

Sentence with two objects

Sentences with various tenses

Learn the Passive - Part 2 (The Forms) - English Grammar

Active and passive voice part1

Causative Verbs for ESL students

Mr Bean - conditional sentences

Conditional grammar

Test

Multiple choice

Practice

Active- passive practice:

http://www.ego4u.com/en/cram-up/tests/hadrians-wall

Causative:

http://www.englishexercises.org/makeagame/viewgame.asp?id=1759

Conditional:

http://www.englisch-hilfen.de/en/exercises/if_clauses/mix3.htm