How to use "fingernails" in a sentence

Sentences

She puts her hands on the table, and he sees that her red fingernails are chipped and bitten

She nods and bites her red fingernails for a moment

The trees hung low, lower, lower still, until, at last, the ice-crusted evergreen boughs frequently scraped across the roof of the Explorer with a sound like fingernails being drawn down a blackboard.