Apostrophes and plurals

We would argue that, above all else, it is the humble apostrophe that creates the most confusion in punctuation.
The apostrophe has just two purposes:
- It indicates possession—Amanda’s shoe, the boss’s desk or the donkey’s tail.
- It indicates omission—can not to can’t , will not to won’t, it is to it’s. These are called contractions.
Apostrophes do not, under any circumstances, make a word into a plural. Plurals are created by adding s or es to the end of a word. For example:
- Apple does not become apple’s—it becomes apples.
- DVD does not become DVD’s—it becomes DVDs.
- Friday does not become Friday’s—it becomes Fridays.
- Princess does not become princess’s—it becomes princesses.
The apostrophe should also never be used after a decade. It is incorrect to say 90’s. You can, however, use the apostrophe to indicate that you have dropped off the 19 at the beginning, so it reads ’90s.
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