Divide the class at least into 3 groups. Students in the groups try to make new affirmative, negative or question sentences on the board. If their sentences are right they have a chance to click on the square corresponding their answers. Under each square there is a sign. If it is a heart they get a life, if it is a skull they lose a life, if it is a gun they shoot a life from any group they want. Students like this game all the time and to play this they practise the topic in a fun way.