Apostrophes are used to show possession. However, you do not use an apostrophe after a possessive pronoun such as my, mine, our, ours, his, hers, its, their, or theirs. For example:
Read more at http://grammar.yourdictionary.com/grammar-rules-and-tips/5-most-common.html#FVgk9FeOQezHUWZP.99
"Would you like to know the number one grammatical error?
Hint: The word involved is small and it’s contained in this sentence."
That’s right: its vs. it’s
Yet the two rules are actually quite easy to remember."
To continue reading this Grammar Tip posted by Grammarbook.com, and learn about when to use it and when to use it's, click here
My name is Craig, and I've been teaching English for many years. I initially created this site for my students, but all English learners are welcome. I hope you find something helpful to you. Feel free to leave suggestions or ideas in the Comments section under any entry.