Here you have some online exercises in order to pactice the use of -en and -ing ending adjectives. Remember the general rule:
We use -ed adjectives to say how we feel about something or someone (effect)
We use -ing adjectives to say how something or someone makes us feel (cause)
Click on the next links:
http://www.better-english.com/grammar/adjing.htm
http://www.oup.com/elt/global/products/naturalenglish/pre/a_grammar/unit10/nepre_grammar10_1/
http://www.ompersonal.com.ar/omexercise/adjetivosyadverbios/unit30.htm
http://depts.gallaudet.edu/englishworks/exercises/exgrammar/adjective.htm
