释义：
tell somebody what 对某人说某事
比前面的 tell sb that 主语+动词更为常用的表达，首先 tell somebody，其次 what, when, where 等疑问词。
例句：
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。
对话：
A: Will you go grocery shopping for me?
你能去杂货店给我买点东西吗？
B: Can you tell me what you need?
那你需要点什么？
