"what do you think you are doing here" in Chinese (Simplified)
Definition
这是一种带有对抗或惊讶口吻的问法，用来质问某人为什么出现在某地或做出某种行为，通常用于对方出现在意想不到的地方或举止不当时。
Usage Notes (Chinese (Simplified))
这个表达多用于表达愤怒或质问，听起来不太礼貌，适合非正式场合。语气很重要，使用时要注意场合和关系，否则容易造成误会。
Examples
What do you think you are doing here? This area is off-limits.
**你以为你在这里干什么**？这里是禁止进入的区域。
My mom said, 'What do you think you are doing here?' when she saw me in the kitchen late at night.
我妈妈说：“**你以为你在这里干什么**？”当她深夜在厨房看到我时。
He asked, 'What do you think you are doing here?' because I was at his desk.
他问：“**你以为你在这里干什么**？”因为我在他的桌子旁。
Woah, what do you think you are doing here? I wasn't expecting to see you.
哇，**你以为你在这里干什么**？我没想到会见到你。
What do you think you are doing here? You can't just walk in like that!
**你以为你在这里干什么**？你不能就这么直接进来！
Hey! What do you think you are doing here going through my stuff without asking?
嘿！**你以为你在这里干什么**，竟然没问就翻我东西？