These options are inconsistent and might not always work. We recommend using the syntax above for consistency.
One trick that seems to provide the most consistence output - sans the above option - is a simple dash - or the em-dash —. You can even add multiple dashes such as -- -- for a longer pause.
"It - is - getting late.."
Ellipsis ... can sometimes also work to add a pause between words but usually also adds some “hesitation” or “nervousness” to the voice that might not always fit.
I... yeah, I guess so..."