English grammar question?

when right use " s' "?
know if subject plural , ends in s , possessive you'd use s', if it's singular?
ex. if subject "chris" singular , ends letter s "chris's" or " chris' "?


in pronunciation word: "animals' " "animals" or "animals[es]?

when right use " s' "? know if subject plural , ends in s , possessive you'd use s', if it's singular? ex. if subject "chris" singular , ends letter s "chris's" or " chris' "? also...

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