Question

Why are you not supposed to split the infinitive of a verb, for example: "To boldly go" should be "to go boldly." Why?

Answer 1

A split infinitive is when other words creep into the middle of an English infinitive. The most famous example is Star Trek’s “to boldly go where no one has gone before”. The Victorians decided that splitting an infinitive was a grammatical mistake, and some people still agree with them.