http://www.english-grammar-lessons.com/pastcontinuous/exercise4.swf http://www.geocities.com/Athens/Rhodes/7796/grammar/pastcontinuous.htm http://www.englishpage.com/verbpage/verbs18.htm http://www.englishpage.com/verbpage/pastcontinuous.html http://www.englishpage.com/verbpage/verbs20.htm http://www.englishpage.com/verbpage/pastcontinuous.html http://www.englishpage.com/verbpage/simplepast.html http://www.english-grammar-lessons.com/pastcontinuous/menu.php http://www.manythings.org/rs/pastcontinuous.html http://www.englishpage.com/verbpage/pastcontinuous.html http://www.english-grammar-lessons.com/pastcontinuous/exercise2.swf

Internet Resources

English Grammar In Use. Understanding And Using English Grammar. English Grammar. Practical English Grammar.

Library Resources