I suggest that, if you have access to a classroom projector (or just a laptop that can be turned round to show the class), you make a powerpoint with all their favourite sports stars - other celebrities could also be included, such as pop stars or film stars not just in their usual activities, but doing other things as well. The Internet is a great source for images - you could try Google images or sports/cinema/gossip magazines to get the images.
The PPT could be helpful in making them realize the form of the verb as well making it appear slowly- you could make a multiple choice quiz with sounds (there are ready-made templates, but it is not difficult to make one yourself with cheers for correct answers and boos for wrong ones).
After this, you could make a worksheet with the same images.
In case you don't want to go into all this trouble, I suggest you look into a wonderful website with great pictures, worksheets, flashcards and everything you could dream of, www.mes-english.com
, which will help you out with the images and everything. Just one thing: don't forget to stress the time expressions and the fact that the action is taking place NOW (as suggested in the visuals).
Happy teaching, as they say!
(I miss my Chilean friends.My best regards!)