释义：
Let me tell you... 我来告诉你……
用来表达和对方说某事。Let me tell you 后面可以直接加名词，也可以 about+名词。Let me tell you something 为引起对方注意的语句，表示“我有事情要说”。
例句：
Let me tell you my story.
我跟你说说我的故事吧。
Let me tell you about my plan to open a restaurant.
我来跟你说说开饭店的计划吧。
Let me tell you something. Your girlfriend isn't cute.
我有话要说，你的女朋友长得不好看。
I have to tell you something. It's about your ex-wife.
我得告诉你一些事情。是关于你前妻的。
对话：
A: I heard you climbed Mount Everest.
我听说你爬珠穆朗玛峰了。
B: Let me tell you, it was really difficult.
我告诉你，这可相当不容易啊。
