Apostrophe Rules. Tip#4: Apostrophes and Plurals
Using an unnecessary apostrophe to form the plural of a noun is a very common mistake. Sometimes, it’s called the grocer’s apostrophe because of how frequently it is spotted in grocery store advertisements (3 orange’s for a dollar!). Don’t do it! With very few exceptions, apostrophes do not make nouns plural.
The one notable exception to this rule is the plural form of lowercase letters, which are formed with an apostrophe to prevent misreading:
Incorrect: Don’t forget to dot all your is.
Correct: Don’t forget to dot all your i’s.- Не забудьте расставить все точки над i.
