<u>In order to create the possessive form of a noun you should add </u><u>'s</u><u>. If the noun ends in </u><u>s</u><u> then you have two options: either you add </u><u>'s</u><u> like you do with any other singular noun or you just add an apostrophe </u><u>'</u><u> at the end of the noun</u>.
boy-boy's
soldier-soldier's
lady-lady's
Jones-Jones's OR Jones'
Princess- Princess's OR Princess'
Shepherd- Shepherd's
child- child's
Mr. Dicken- Mr. Dicken's
man- man's
kerry- kerry's
<u>If the noun is in plural and ends in </u><u>s </u><u>then you will just add an apostrophe </u><u>' </u><u>at the end. If it is in plural but it doesn't end in </u><u>s</u><u> then you should add </u><u>'s</u><u>.</u>