Here is a simple game to practice the conditional, submitted by Jo Budden to the British Council’s Teaching English website:
This game is good to revise and practice structures in the first conditional. The teacher begins with a sentence, for example “If I go out tonight, I’ll go to the cinema.” The next person in the circle must use the end of the previous sentence to begin their own sentence. E.g. “If I go to the cinema, I’ll watch Charlie and the Chocolate Factory.” The next person could say, “If I watch Charlie and the Chocolate Factory, I’ll eat lots of chocolate.” Then, “If I eat lots of chocolate, I’ll put on weight” etc. etc.
For more game ideas from the same site, go to http://www.teachingenglish.org.uk/language-assistant/games