1) These are Pushkin’s (singular) poems.
2) The ante-room was hung with leopards’ (plural) skins and carpeted with tigers’ (plural) skins.
3) A new stock of ladies – gentlemen’s (complex word, irregular noun in the plural from does not have “s”, so we should add “s” after the apostrophe) shoes is on sale.
4). For the sake of politeness (no apostrophe is needed) stay a little longer.
5). Goat’s (singular) milk contains more fat than cow’s (singular) milk.
6) Many of Scott’s (singular) novels are more romantic. Dickens’ (singular but the surname ends in “s”) novels are not nearly so true to his life.
7) Emperor Pavel’s (singular) murder was carefully planned beforehand.
8) This hero is in Keats’ (singular but the surname ends in “s”) “Endymion”.
9) Four sheep’s (irregular noun in the plural form does not have “s”, so we should add “s” after the apostrophe) heads appeared above the hedge.
1) I have read three Dickens’ novels and two Austen’s ones.
2). Xantippe was Socrates’ wife.
3). There was a party at the Polly Davis’ house last Friday.
4). My younger brother’s wife is a singer.