Complex Sentences:
Sentence Speedway (Recognize Clauses):
http://www.harcourtschool.com/activity/sentence_speedway/index.html
Dependent or Independent Clause Billionaire Game:
http://reviewgamezone.com/games/superpong/index.php?3580&title=Sentence%20Structure&id=3580
Sentence Sort:
http://www.harcourtschool.com/activity/sensort/index.html
Complex Sentence Bandstand
http://www.harcourtschool.com/activity/sentence_band/index.html
Who Wants to Be a Millionaire Game (Challenging):
http://www.quia.com/rr/126726.html
Choose the best subordinating conjunction (quiz):
http://a4esl.org/q/f/z/zy57mbw.htm
Simple, Compound, and Complex Ping Pong Game:
http://reviewgamezone.com/games/superpong/index.php?3580&title=Sentence%20Structure&id=3580
Simple, Compound, and Complex Soccer Shootout Game:
http://reviewgamezone.com/games/supertaker/?4268&title=Simple%20Compound%20%20Complex%20Sentences&id=4268