tell somebody what  对某人说某事

　　Can you tell me what's going on in there? 你能告诉我那里到底发生了什么事情吗？

　　Excuse me, can you tell me what happened? 不好意思，你能告诉我发生什么事情了吗？

　　I need you to tell me who did it. 你应该告诉我是谁干的。

　　I'll tell you what happened to me yesterday. 我跟你说昨天我碰到过的事情。

　　Will you go grocery shopping for me? 你能去杂货店给我买点东西吗？

　　Can you tell me what you need? 那你需要点什么？