Номер 4 я ничего не понимаю

1. I can't play marbles. He/She can't play marbles. 2. I can ride on merry. I can't ride on merry. He/ She can't ride on merry. 3. I can sing English songs. I can't sing English songs. He/She can't sing English songs. 4. I can draw horses. I can't draw horses. He/She can't draw horses. 5. I can play computer games. I can't play computer games. He/She can't play computer games.