Split Infinitives and Verb Phrases
7.3.5 Split Infinitives and Verb Phrases
Although some authorities may still advise the avoidance of split infinitives, this proscription—a holdover from Latin grammar, wherein the infinitive is a single word and cannot be split—has been relaxed. In some cases, moreover, clarity is better served by the split infinitive.
The authors planned to promote exercising vigorously. [Is it the exercising or the promotion of exercising that is vigorous?]
The authors planned to vigorously promote exercising.
The authors planned to promote vigorous exercise.