Graphotactics of possessive: the true reason for the apostrophe
Solution 1:
The apostrophe is used to indicate something is missing.
So in don't the letter o is missing.
The usage is still the same for possessives: James' indicates the -es is missing from the end the word — Jameses being the correct pronunciation in this case. Similarly with Fred's except we no longer say Fredes. This happens because old English used the Germanic suffix -es to indicate possession.
The situation gets more complex for plural entities. English uses the French suffix -s to indicate plurality. There is an obvious clash with the -es possessive suffix made even more painful by the fact that this is normally rendered as a plain -s.
- The boy's home — the boy is home
- The boy's home — the home belonging to this boy
- The boys' home — the home belonging to those boys
- Or even The boys' home account — the account belonging to an institution housing boys