I can't take it anymore.
Today I was on the bus and I noticed a poster with this printed on it
' The following service's will be running ... '
So I've decided, for once and for all, I'm going to explain the use of the apostrophe.
* They are never used to make a plural
e.g 1 service, 2 services
1 kiss, 2 kisses
1 sheep, 2 sheep
* They usual point to an abbreviation:
e.g. It's a nice day = It is a nice day
There's a man at the door = There is a man at the door
* They are also used to create a possesive form
e.g Ben's toys
The dog's bone
Except when using 'it' 'her' 'our' 'yours'
e.g The bone is in its mouth
* If you are referring to a plural possesive however, the apostrophe goes AFTER the last letter
e.g The dogs' bones