A split infinitive occurs when an adverb or other word is inserted between 'to' and the verb. One of the most famous examples of a split infinitive is the Star Trek tagline: "to boldly go where no man has gone before." The adverb 'boldly' splits the infinitive 'to go'. Confused? Here are 12 more grammar rules that you might not know; from rogue comma splices to the pitfalls of homonyms.
The infographic below was created by UK-based online proofreading service The Expert Editor. Most of the rules contained within will be obvious to Lifehacker readers (if you don't know the difference between 'there', 'their' and 'they're' you've probably stumbled onto the wrong site.) Nevertheless, it can't hurt to refresh your grey matter with these concise explanations.
[Via The Expert Editor]