Compound Possession | Grammar Girl
www.quickanddirtytips.com › education › grammarOct 14, 2019 · 1. With Nouns, How You Write a Compound Possessive Depends on Whether Things Are Shared . If you're trying to write about possession and you have two subjects that are nouns, you have to decide if the two people possess something together or separately. If the two people have the thing together, they can share the apostrophe-S.