A - Construction
· We add an -'s to singular nouns (even those ending
with an -s) and to nouns in the plural without -s.
Example: John's birthday
My boss's secretary
Children's feelings
· We add an apostrophy (-') to plural nouns ending
with an -s.
Example: The horses' stables
Note:
The second noun (that follows 's) loses its article.
Insusceptible