crazy
单词辨析：
指精神错乱的，或行为不理智的、失控的。
They realized that the captured spy had gone mad.
他们意识到那名被俘的间谍已经疯了。
The cartoon figure was depicted as a mad scientist.
这个卡通人物被刻画成了一名疯子科学家。
You must be mad to say that!
你那么说简直是疯了！
People all went mad with joy.
人们全都欣喜若狂。
指精神失常或不理智的，常可与 mad 换用。
He feels so alone that he sometimes wonders if he's going crazy/mad.
他觉得非常孤单，有时候他怀疑自己是否快要发疯了。
A crazy/mad old woman lived in that room.
一个疯老太婆住在那个房间里。
表示患精神病时，mad 与 crazy 均含冒犯之意，通常用 mentally ill 来代替。
指因极度焦虑或恐惧而情绪失控的。
His mother hasn't been able to reach him on his cellphone and is getting frantic.
他母亲一直打不通他的电话，急得快要发疯了。
She was frantic with worry.
她担心得要命。
指因极端不安、担心、激动等而行为或情绪失控的。
hysterical screams
歇斯底里的尖叫
She became hysterical and began crying.
她变得歇斯底里，开始大哭起来。
He became almost hysterical when he heard the news.
他听到这个消息时几乎要发疯了。
相关例句：
The driver grunted, convinced that Michael was crazy
司机嘟哝了一声，认定迈克尔是发疯了。
What a crazy scheme, and I use that term advisedly.
这是个多么疯狂的计划，我用了那个词是斟酌过的。
Some people can diet like crazy and not lose weight.
有些人拼命节食也不能减肥。
This sitting around is driving me crazy
老这样坐着无所事事快让我发疯了。
So there we were with Amy and she was driving us crazy
就这样，我们和埃米到了一起，而她快把我们逼疯了。
If I sat home and worried about all this stuff, I'd go crazy
如果整天坐在家里为这些事情担心，我会疯掉的。