PAST CONTINUOUS

http://s.mound.free.fr/skyblues67/WasWereVing/conjwasworking.htm

http://www.english-grammar-lessons.com/pastcontinuous/exercise2.swf

http://mrbrownslearningspace.com/wp-content/uploads/2015/01/Past_Progressive_1.htm

http://www.english-grammar-lessons.com/pastcontinuous/exercise3.swf

http://cerquella.com/bilingual/deploy2/Unit3/grammar_1.html