核心区别

at:动作的朝向，倾向于动作没有到达
to:动作的移动方法或传递方向，倾向于动作已经到达

简单语境

• She smiled at me when I entered the room.
• He waved at his friend across the street.
• Please give this book to your sister.
• The teacher shouted at the students to be quiet.
• I looked at the sky and saw a beautiful sunset.
• Can you send this letter to your cousin?
• He threw the ball to his brother.
• She pointed at the picture on the wall.
• I spoke to my manager about the project.
• They laughed at the funny clown at the circus.

复杂语境

• She shouted at her friend across the park so he could hear her.
  • ✅ 正确答案：to
    👉 因为这是为了让对方“听见”，是 shout to sb（出声给某人听）。
    你写了 at，这更像是“冲某人吼”，带情绪。
• The angry customer shouted to the waiter because of the bad service.
  • ✅ 正确答案：at
    👉 这里是带着情绪责骂服务员，所以用 shout at sb。
    你写了 to，就变成了“对服务员大声说”，没体现出生气。
• He threw the ball at his teammate so she could catch it.
  • ✅ 正确答案：to
    👉 因为是为了让队友接住（传球），所以用 throw to sb。
    你写了 at，这会变成“朝队友砸过去”，就有点凶😅。
• The boy threw a stone at the dog to scare it away.
• Please explain the problem to me more clearly.
• Everyone laughed to his silly mistake during the game.
  • ✅ 正确答案：at
    👉 固定搭配 laugh at sb/sth。
    你写了 to ❌，英语里不会说 laugh to。
• She looked at me, but she didn’t say anything.
• The teacher spoke to the class about the homework assignment.
• My little sister pointed at the sky and said she saw a plane.
• The guide pointed at the map to show us the location of the hotel.