 Activity for teaching passive voice, change the room. This is a tried and tested game that's been used with the passive voice for a long time. It's a lot of fun and easily adaptable to past and present tenses, although you may need to be creative if you want to use any future forms. Divide your class up into teams, and send one member from each team out of the room for 1-2 minutes. Have other students move things in the room, and then call the students back in. The idea is for them to say as many things as possible, that have been changed within a time limit, awarding a point for each correct sentence. It's important to set a time limit so that as many students as possible get a go. The sort of language you should expect is... The table has been moved. Have students enter the room without notice, the chair is being moved. The curtains were being closed when I walked in. To maximize student talk time, you can then have each student say something that wasn't spotted at the end of each round. The board markers were put on a chair.