Possessive Gerunds · engVid
www.engvid.com › possessive-gerundsengvid1993. Hi teacher. I have a question: When we can use “their” instead of “them” in this grammar (possessives with gerunds). farzane. It’s the same as the other examples. You are supposed to use “their” for the possessive. Example: “They weren’t happy about their leaving early.”.