Last we saw of him he was swimming across the river.
It took her 45 minutes to swim across the river.
Also, you're going to be swimming across the current, down there, instead of with it.
"Why don't we just swim across the river to the other side?"
You won't see anyone in their right mind attempt to swim across it.
He'd swim across the river in this form and clear the far side of the enemy!
He was alone and didn't want to swim across this terrible river.
He hadn't swum across the lake just to fall into her arms.
Words and pictures swam across the pages in front of him.
I can just sneak out sometimes and swim across the lake.