I'm a little confused about making something possessive. For example, if I were to write

Question

America's history is fascinating.
would that be correct, or would "Americas", or "Americas'" be right? Also, suppose you wanted to say that a dog belonged to Mrs. Ness (or anything ending with s). Would you say it's Mrs. Ness's or it's Mrs. Ness' or what? Thanks for any help!

Answer 1

America's history is correct.

This site is excellent for help in using possessives.

http://grammar.ccc.commnet.edu/grammar/possessives.htm