In 1 sentence, explain how to use an apostrophe to show possession for singular and plural nouns and to form contractions.

Use an apostrophe followed by "s" (’s) to show possession for singular nouns (e.g., "the dog's leash"), and for plural nouns that do not end in "s" (e.g., "the children's toys"), while for plural nouns that do end in "s," place the apostrophe after the "s" (e.g., "the dogs' owner"), and use an apostrophe to form contractions by replacing omitted letters (e.g., "don't" for "do not").