How to use "lets" in a sentence

She lets out a laugh, a laugh that is horrible to Branwell

He takes a cigarette from his packet, lights it and lets the hot evening sun shine down on his bald head.

And for the first time in a week, Gerry relaxes and lets his anxious, pale face smile.

The scream comes from Big Jones, who suddenly lets go of the knife.

And while she watches, she lets the flames touch her, too

"My God," says Edward, "she lets the flames burn her."