Grammar Tip: Is It It’s or Its Or Is It Confusing?

Its, It’s

• its = possessive adjective (possessive form of the
  pronoun it): The crab had an unusual growth on its shell.
• it’s = contraction for it is or it has (in a verb phrase): It’s still raining; it’s been raining for three days.
• (Pronouns have apostrophes only when two words are being shortened into one.)