With imagery, or in abstracts. I have an internal monologue but not everything is a monologue. If I’m working on a project of some kind I’ll usually keep a mental model of the current piece I’m working on in my head. There’s no monologue attached, it’s just a “working copy” of my current task.

Or for example if I’m reaching somewhere I can’t see to plug in a usb port or something I’m visualizing in my head what my hand is doing, but I’m not talking myself through it.