Сделайте приложения отрицательными those boys play football at the school sports ground.my father is a good sportsman.bob doesn't like to play snowballs with me.i don't think about you.

Those boys don't play football at the school sports ground.My father is not a good sportsman.Bob likes to play snowballs with me.I think about you.

 Those boys don't play football at the school sports ground.My father isn't a good sportsman.Bob doesn't like to play snowballs with me.I don't think about you