Apostrophes have three uses: to show possession, to show that letters of a word have been left out (contraction), and to form the plural of abbreviations.
Show possession of a singular noun by adding ‘ s
Boy’s hoodie Gina’s lipgloss Matt’s sandwich My boss’s coffee mug
Show possession of a plural noun ending in s by adding an apostrophe
The Adamses’ car Our bosses’ decision
Show possession of a plural noun not ending in s by adding ‘ s
Children’s books Women’s dresses Men’s shoes
When two or more nouns (person, place, thing, or idea) have joint ownership, the last noun shows possession. When the nouns show individual ownership, each noun must show possession.
Megan and Carly’s contract with the company will run out soon. (Both girls have a single contract with the company).
Megan’s and Carly’s contract with the company will run out soon. (The girls have separate contracts with the company).
Use an apostrophe where letters have been left out.
Cannot = can’t
Madam = Ma’am
Going = goin
Do not = don’t
Plurals of Abbreviations:
Use ‘s to indicate the plural of an abbreviation or other short words.
I got all A’s on my report card.
He earned two M.B.A’s.