Any kind of “Alibi” game is perfect for practicing past tenses (esp past simple and past continuous). Make up any story that something was stolen at the party at 10 pm last night. You can always change the plot and the worksheet a bit to make the situation truer to life. Divide the ss into policemen and suspects. Policemen have to write down questions. Suspects work in pairs to come up with their answers and memorize them. Once everybody is ready policemen question suspects separately. If the information suspects give is the same they are free to go. But the more different answers they give, the more likely they are to be the thieves. Enjoy!