To form possessive on words ending with a silent 's', The Chicago Manual of Style recommends the apostrophe s, but also allows for just apostrophe. So under this style rule, you could use either one: Illinois' or Illinois's. The AP Manual of Style calls for just an apostrophe, Illinois'. Interestingly, in March 2007, the the Arkansas State Legislature created a non-binding resolution stating that the possessive of Arkansas should be apostrophe-s. Also of interest, most newspapers use only the apostrophe to make possessives of silent 's' words. See Related link.
Him is not possessive. The possessive would be 'his'.
No, he is not possessive. The possessive form would be his.
The singular possessive is biker's; the plural possessive is bikers'.
Women's is a plural possessive. The singular possessive is woman's
The singular possessive is ant's.The plural possessive is ants'.
The possessive form of "he" is "his": He did his homework after dinner.
The singular possessive is "ox's". Another contributor wrote "oxen's", but that is the plural possessive.
The singular possessive is Richard's; the plural possessive is Richards'.
The singular possessive is athlete's. The plural possessive is athletes'.
Possessive nouns (but not possessive pronouns) use apostrophes; therefore, "brother's" is possessive. "Brothers" is plural.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'