It's split in Captain Kirk's "to boldly go"

Usage examples of infinitive.

Jonathan could get away with grunts and even split infinitives around his father, where his mother would come down on him like a ton of bricks.

Some infinitives seem to improve on being split, just as a stick of round stovewood does.

We have no other clue than the apparent fact the infinitive of A-stem verbs is identical to the verbal stem itself, with no additions.

Here the verb polin "I can" is a finite form, the aorist of the primary verb pol appearing with the pronominal ending -n "I" attached but the word quetë must be analyzed as an infinitive.

The quote, reproduced above, apparently only deals with the infinitive form of primary verbs the ones that have aorists in -ë or with endings -i-.

No priestly dogmas, invented on purpose to tame and subdue the rebellious reason of mankind, ever shocked common sense more than the doctrine of the infinitive divisibility of extension, with its consequences.

FORRY RHO DAN replies: If there is any word in this world that wordsmith Ellison hates, loathes, detests & abominates, it is "sci-fi," so rash reader Graham, prepare to be dangled by your participle over a pit of split infinitives until your gerund becomes positively putative, when Horrible Harlan learns of your heinous employment of the egregious neologism.

He had suffered much from his own lack of education and he wished these boys to be literate creatures, to whom the difference between an ablative absolute and a prolative infinitive was as evident as that between a ship and a brig.

The present infinitive of any verb can be transformed into an abstract noun.

I can identify a split infinitive or dangling participle or hyphenated neologism, but I'm not equipped to spot a tufted titmouse or yellow-bellied sapsucker.

Our guy didn't use a single dangling participle or split infinitive.

I will not labor this point, since we are simply applying an old rule to a new field, but there is no more excuse here than elsewhere for split infinitives, dangling participles, and similar untidiness, or for obscurity and doubletalk.

Verbs can be in the Indicative mood, or Interrogative, Subjunctive, Optative, Conjunctive, Infinitive.

Add to number three: Thou shalt not split infinitives, or dangle participles.

But when an object or an infinitive is to follow, I find it slightly awkward to separate it from the finite verb by inserting an adverb between them.