The document provides examples of expressions that can be used to express sadness in English. It includes informal and formal phrases for expressing feeling sad oneself or responding empathetically to others who are feeling sad. Sample dialogues demonstrate using the expressions in conversations between friends and colleagues. Key points covered include acknowledging the other person's sadness, asking open-ended questions to understand what they are sad about, and offering help or support. The document aims to help readers express and respond to feelings of sadness appropriately in English.