In 2-3 sentences, explain how to use an apostrophe to show possession for singular and plural nouns and to form contractions.

To show possession with a singular noun, simply add an apostrophe before the "s" at the end of the word. For plural nouns ending in "s," place the apostrophe after the "s." To form contractions, use an apostrophe to replace the missing letters or sounds being omitted from the contracted word or phrase.