You can go bananas, or you can be bananas.

你可以go bananas，你也可以be bananas。

If I'm late again, my Dad will go bananas.

如果我再迟到，我爸爸要气坏的。

Don't talk about math any more. I'll go bananas.

别再跟我提数学了，我快发疯了！

I'll go bananas if I have to do the homework again.

如果非要我再做一遍家庭作业，那我会发疯的。

But if you go bananas, you are wild with excitement or worry.

如果说“你疯了”，就是说你因兴奋和担忧变得疯狂。