He lifted the bar with ease.

He lowered the bar for entry into the competition.

He is pushing the edge of the envelope with his innovative ideas.

Beyond the shadow of a doubt, he is guilty.

She keeps her secrets locked away in the closets of her heart.

He used a knife to whittle the whalebone into a small figurine.

They burn the coal to generate electricity.

He burns the coal to generate electricity.

They are burning the coal to generate electricity.

He burned the coal to keep warm.