Can you see my hands shaking at the idea?

He was trembling, and he didn't know what to say; he just let me go.

With trembling hands I take a cigarette from a colleague and head out of the building.

She then took the little key, and opened it, trembling, but could not at first see anything plainly, because the windows were shut.

She wonders if he's looking at her, if he can hear her voice trembling.