"Good for you" might sound sarcastic Tips: It depends on the context and your tone. 1️⃣when we were being sincere Ex: I heard you won the lottery, good for you.(If you won't be sounded sarcastic, so please pay attention to your tone and context.) Ex: I can tell you worked really hard on this project, good for you.(congratulations, well done) Ex: Good for you, I'm happy for you.(sincere) Ex: Good for you, so happy to hear it. Ex: Good for you, congratulations! 2️⃣being sarcastic, jealous Ex: Good for you, awesome, I'm still single. Role Play: A: We got a new puppy. It's so cute! B: Good for you(positive), I bet your kids are so excited. A: They are. They've always wanted a dog. B: Puppies are a lot of work though, It's nice to keep them for a train. It has never accidentally anymore. A: Good for you(sarcastic). This puppy has accidents constantly!