But for the last 5 years or so, it's true that he really swims alone.

No one of any age, least of all children, should swim alone.

Every day, she takes him down to the river to swim alone against the current.

A female employee swims alone in a pool otherwise empty of people.

You should not swim alone, particularly at isolated beaches.

The pages of the atlas had been turned; now Europe alone swam towards them.

It is dangerous to swim alone at isolated beaches, especially after dark, due to strong currents.

Fish swimming in schools move faster and use less energy than fish of the same species made to swim alone.

What was it they said about never swimming alone?

If you're swimming alone, it might not be the best idea.