Split infinitives should be avoided in formal writing. In formal writing, it is considered bad style to split an infinitive, but in more informal writing or in speech this has become more acceptable.

Why should we avoid split infinitives?

Infinitives are the verb form that is preceded by "to." To split an infinitive is considered a grammatical crime in many circles. Nonetheless, there is often no good reason not to split infinitives, and in some cases it can improve clarity, avoid weak language, or prevent writing from sounding overly formal.

Can you have two infinitives?

You can also use multiple infinitives in a single sentence: “Today, I plan to run three miles, to clean my room, and to update my budget.” All three of these infinitives follow the verb plan. Other verbs that often come before infinitives include want, convince, try, able, and like.