• say 和 tell 是不规则动词，过去的简单形式是 said 和 told。

• say 侧重于某人说过的话，tell 侧重于某人所说的信息。
  'Hello', She said.
  He told me that he was going on holiday.
  tell 常和 truth, a lie, a joke, a story 搭配。
  You should always tell the truth.

• speak 和 talk 通常和 say 是一个意思，但在使用上有一些不同。
  speak 比 talk 更正式。
  I will speak to my manager about it.
  我会和我的经理谈谈这件事。
  She is talking to her friends.
  她正在和她的朋友们谈话。
  接语言词用speak, speak English.

It's hard to stay mad, when there's so much beauty in the world.
世界这么美，很难一直生气。——《美国丽人》