Explanation
Part 1 (grammarquizzes.com)
Part 2 (grammarquizzes.com)
Practice
a) Practice 1
b) Practice 2 (esl.about.com)
c) Practice 3 (english-zone)
d) Practice 4 (quia.com)
e) Practice 5
f) Practice 6 (glow)
g) Practice 7
h) Practice 8
i) Adjectives Ending with -ed and -ing (a4esl)
j) More ed vs. ing here (bbc)
Workshop resources compiled by Ted Friedenson