What do apostrophes and this guy have in common? They love to show possession!
Watch the above video and make sure you know
Where does the apostrophe go to mark possession? (NOUN = substantiv)
What do you do when a word ends in "s"?
Which pronouns have possession "built in"?
Where does the apostrophe go to mark contractions?
This mark of punctuation has two main distinct and very important jobs:
To show possession (belonging to)
To make contractions (removing letters)
Thus, the best way to get apostrophes right is to understand when and why they are used. Just think of the apostrophe as a little hand, holding on to an "s" to indicate ownership. This is called a 'possessive relationship'. Also, remember that whenever you consider using a short cut in spelling, the apostrophe is the glue that holds the parts together!
Revision - or if you're still confused: