"to say" 出現在以下情況下：
1. 在引用別人說過的話時：
- She said, "I am going to the store."
- He told me, "I will be there at 6 o'clock."
- They asked, "Are you coming with us?"
2. 在表示建議、意見或命令時：
- I would say we should leave early to avoid traffic.
- She said, "Don't forget to lock the door when you leave."
- He said to them, "Do your homework before watching TV."
3. 在描述某人正在發表他們的感受、看法或想法時：
- She said, "I feel tired today."
- He said, "I think we should take a break."
- They said, "We want to go on vacation."
4. 在告訴某人或向某人提供信息時：
- He said to me, "The meeting was postponed."
- They said, "The concert starts at 8 p.m."
- She said, "I am not feeling well today."
總而言之，"to say" 在引用別人的話、表示建議或命令、描述感受、看法或想法以及告知或提供信息時使用。