TO BE: Simple Past Tense

http://www.theyellowpencil.com/gramatobepast.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=366
http://www.englishexercises.org/makeagame/viewgame.asp?id=5135
http://www.englishexercises.org/makeagame/viewgame.asp?id=5133
http://www.englishexercises.org/makeagame/viewgame.asp?id=3509
http://www.englishexercises.org/makeagame/viewgame.asp?id=5211