A skateboarder in a red baseball cap , black shirt and tan shorts skates alone in a wide open space .
The skateboarder is by himself .
A skateboarder in a red baseball cap, black shirt and tan shorts skates alone in a wide open space.
The skateboarder is by himself.
Skates alone and by himself imply the same thing. He is alone.
Skates alone and by himself imply the same thing . He is alone .