Adverbial phrases provide circumstantial information, and t...
I. Fronting negative adverbials like "Under no circumstances" or "Seldom" requires subject-auxiliary inversion (e.g., "should you go").
II. Adverbials of frequency always trigger inversion when placed at the beginning of the sentence (e.g., "Sometimes go I").
III. "Little did he know" is a fixed phrase exemplifying negative inversion used for dramatic or emphatic effect.
Select the correct analysis: