tread something into something
tread something onto something
tread something over something

The horses soon tired of treading over ground that gave way at every step.

He argued that the court was treading over the editorial process at the network.

The children's feet sank into it as they trod over it.

They trod over the spread claws of roots where the little trees had been torn down.

The Bulls then trod over the Lakers to take a 2-1 lead in the series.

There was a fairy hill, and in his drunken state, he trod right over it.

"In Hudson County, we must tread very lightly over the little open space that remains," he said.

Beautiful warriors trod over him, thinking his unseen body a corpse.

Out of the woods in measured tread over beechnuts from the year before.

He trod silently over the thick rug, and slipped into a chair.