Split Infinitives

Definition: The insertion of a word or phrase between “to” and the verb.

to madly love; to deliberately lie

Not a split infinitive:

to be always prepared
to be constantly searching

Split infinitives are no longer considered to be an egregious error; in fact, sometimes the split infinitive is the only way something can be expressed. If a split infinitive can be avoided by placing the modifier elsewhere without detracting from the impact or readability of the sentence, that is preferable.