Split adverbials
hardly... when, barely...when, no sooner...than, not only...but also, so...that, such...that
Form:
Adverbial + auxiliary or modal verb + subject + main verb
Or
Adverbial + be + subject
Examples:
Note that, in this last example, the second part (than) of the two-part adverbial is positioned at the start of a new subject-verb clause.