ED-ING ADJECTIVES

http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/ed-ing-adjectives.html

http://ww2.college-em.qc.ca/prof/epritchard/boreding.htm

http://www.grammar-quizzes.com/passive3a.html

http://www.better-english.com/grammar/adjing.htm