你是不是疯了，竟做出这样的事？

Are you mad that you should do such a thing?

youdao

买东西的人说：你是不是疯了？

The buyer said, Are you crazy?

youdao

你觉得你真的能被治好吗？你是不是疯了？

"Even we can't see with mud in our eyes!" "Are you crazy enough to think you'll really be healed?"

youdao

Here, you come here, you try to tell people hello, they wonder if you're crazy.

在这里，你在这里，你试着跟别人说“你好”，他们却会怀疑你是不是疯了。

和纽约的留学生 - SpeakingMax英语口语达人