Are you wondering what was wrong with Jane’s usage of “its” in the last post? “Its” is a possessive pronoun (e.g., Jane returned the dog to its owner) whereas “it’s” is the contraction for “it is” or “it has.” Jane was trying to say, “I still don’t think it is funny,” which calls for “it’s” rather than “its.” So what’s an easy way to figure out which one to use? If the sentence works with “it is,” add the apostrophe.