基础询问 - Why are you sad？
- How are you feeling？
具体情境扩展
- Can you tell me why you're so sad？
- What's causing you to feel down？
- Are you feeling overwhelmed by life's demands？
表达情绪状态
- I feel so blue today.
- I'm in a bad mood today.
- I feel kind of blue today.
温和表达
- It's hard to understand why you're feeling this way
- I'm a little worried about you
建议：
询问时注意语气和场合，若对方情绪低落，可先表达关心（如"Are you okay？"），再逐步深入询问。不同表达方式适用于不同关系和场景，例如：
朋友间可用"How's your day going？"（轻松询问）
普通熟人建议使用"May I ask how you're feeling？"（更正式）
熟悉的人可用"Tell me what's on your mind"（直接表达关心）