General Principle	Details		Incorrect Example	Correct Example
11 Leave out unneeded apostrophes.		a) Never end a verb with ‘s.	He eat’s his lunch.	He eats his lunch.
		b) Never make plurals by adding ‘s.	I have three cat’s.	I have three cats.
		c) Never use an apostrophe with her or who.	This one is her’s. Who’s car is this?	This one is hers. Whose car is this?
		d) it’s = it is.	The dog ate it’s bone. (The dog ate it is bone.)	The dog ate its bone.