Apostrophe in Greengrocers' World

What is the correct usage of the apostrophe?competitor's products
Quite a number of english speaking individuals doNote that:
not seem to know, as can be seen by the* In the plural the possessive apostrophe is placed
number of errors in shop signs andafter the -s:the dogs' bone (more than one dog),
advertisements. Therefore follow some englishthe companies' policies (more than one company)
grammar basic rules worth knowing for english* An apostrophe is not used with "it":
translators or writers. Some of the worst culpritsThis is in its best interest
are supposedly greengrocers, thus the expressionIt is its best offer
the "greengrocer's apostrophe". Signs can often* What about names that end in -s?
be seen promoting juicy pear's, savory apple's orThere is no hard and fast rule here. It is usual to
the best banana's . Greengrocers however areadd -'s after the first -s, for example:
not the only ones to get it wrong. Here are a fewMr Jones's speech, St James's Street .
more real world examples of incorrect utilisation:However it has also become accepted practice to
Menu's printed.simply add an apostrophe (Dickens' novels).
New CD's just in.An apostrophe is NEVER used when the -s simply
Open Sunday's.signals the plural form of a noun!
Ideal for heaters, lighting, TV's, radio's and otherHence: the greengrocer sells "juicy pears, savory
appliances.apples and the best bananas ", and the other
There is now an association called Theexamples of wrong usage given at the beginning
Apostrophe Protection Society, established in 2001of this article should read:
with the aim of hunting down examples of misuseMenus printed.
and reminding people of the rules for usingNew CDs just in.
apostrophes.Open Sundays.
Perhaps it is hardly surprising that foreignIdeal for heaters, lighting, TVs, radios and other
speakers have troubles with the apostrophe, ifappliances.
the British or American can't get it right!One last point: be careful when using your and
So what is the rule? It's actually quite simple.you're. Confusion is easy, as they sound the
An apostrophe is to be used in two cases:same.
1. to indicate omitted letters:Your is possessive: this is your car
I'm afraid I can't make the appointment ( I amYou're is a contraction of "you are": you're right
afraid ... I cannot)about the schedule.
It's really quite true (it is)And beware - tracking down examples of
I don't know that story (I do not know)incorrectly used apostrophes can become quite
2. to denote possession : the dog's bone, thehabit-forming!
president's people, the company's policies, our