What's eating you? 是“什么把你吃掉”？真实意思和“吃”没关系！
也可以说成 what's bugging you？
意思其实是What is annoying or bothering you?
比方说，你现在看起来心情非常不好，你的朋友出于关心可能会问你what's bugging/eating you?
这个俚语的使用可以追溯到19世纪后期，大概用“吃”来表达“消耗”的意思。bug的口语变体出现于1940年左右，意思是“烦扰”。
When something is eating at you, it is consuming your thoughts, time, and energy. It makes you depressed and you suffer from it. This phrase is asking someone who looks depressed why they are not happy.
当有东西在吃你的时候，它其实是在消耗你的思想、时间和精力。它会让你感到沮丧，你会因此而苦恼。这个短语是在问一个看起来很沮丧的人为什么他们不开心。
例：
A. You seem really upset. What's eating you?
你看起来很沮丧。什么事让你不开心了?
B. I got dumped, and I feel terrible.
我被甩了，我感觉很糟糕。
A. Sorry to hear that.
很遗憾听到这个消息。
said when you want to know what someone will give you if you give them the piece of information they have asked for
对我会有什么好处呢?
例：
A: Do you know where Dave's living now?
你知不知道戴夫现在住在哪里?
B: What's it worth?
告诉你对我有什么好处?”
used to say that you think something is very good, and that nobody could disagree with your opinion
(表示认为非常好)有什么不好的呢?
例：
It's a big house with a swimming pool. What's not to like?
一座带着游泳池的大屋，还能有什么不好的呢?
used when you do not understand why something or someone is so popular or fashionable
(用于表示不理解为什么某人或某物如此流行)那算是什么?
例：
Pierced tongues - what's that about, then?
在舌头上穿孔——那算是什么?
今天的内容都学会了么？