我一步都没离开过
“I have not taken a single step away.”
THE DIALOGUE REEL
安郡王
“Your Highness,”
我 一步都没离开过
“I have not taken a single step away.”
我用我脑袋发誓
“I swear on my life,”
Direct spoken expression in this communicative setting.
In historical hierarchies, subordinates under suspicion often had to make absolute, life-risking oaths to establish credibility.
LEARNING CHUNKS & PARTICLES
haven't left for even a single step / never left one's post
A strong emphatic structure using '一步都' + negative verb to state an airtight alibi or strict vigilance.