1. I felt sorry for your fail of the exam yesterday.

2. The sad past is heartbroken.

3. I'm sad to hear about...

4. Some people don't have to say goodbye because they just pass by.

5. Empty seats, once filled with laughter, now only echo loneliness.

6. Time Heals All Wounds, But Time Also Forgets.

7. I said, people's life, sometimes, just like this, gradually ended.

8. Clearly do not love, why do I still cry!

这些句子都以不同的方式表达了过去的悲伤和怀旧情感。希望这些能够满足你的需求。