Have your students write four "I've....." sentences. 3 are true, 1 is false. Then, if you have a small class (under 8), have the students read out their sentences and the other students guess which one is false. For more advanced (or just really small) classes, they can ask some questions to try to figure out the false one. Once the students guess (individually), they get a point for a correct guess. If you have a bigger class, put the students in groups of 5 or 6 and let them play together while you supervise.
teaching esl grammar