A skateboarder in a white shirt grabs the side of his skateboard in midair .
A skateboarder was attempting a new trick .
A skateboarder in a white shirt grabs the side of his skateboard in midair.
A skateboarder was attempting a new trick.
Even though the skateboarder is attempting a trick, we don't know if it is a new trick for him or not. Therefore, you cannot assume that it is a new trick.
Even though the skateboarder is attempting a trick , we do n't know if it is a new trick for him or not . Therefore , you can not assume that it is a new trick .