She was borne down by the weight of her responsibilities.

The fire burns down the entire building.

The team bore down on their opponents and scored a decisive victory.

The firefighters are working hard to extinguish the fire that is burning down the building.

The rain was beating down on the roof.

The car breaks down on the highway.

My car broke down on the way to work.

He knocked down the tower of blocks.

He knocks down the tower of blocks.

He is knocking down the old building.