Halliday & Matthiessen (2014: 98-9):
Marked Adjunct and Complement Themes are followed by the Subject in Modern English — a[n] historical departure from the general principle in Germanic languages that the Theme is followed by, and thus marked off by, the Finite in a declarative clause. The general exception to this departure in Modern English is a clausal negative item as Theme — an Adjunct or Complement with a negative feature that pertains to the clause.* Such negative Themes are followed by the Finite.
* This applies to circumstantial Adjuncts with a negative feature, e.g. nowhere as a locative Adjunct; and it also applies to modal Adjuncts with a negative (or quasi-negative) feature, e.g. never, hardly.