be crazy for意思是渴望，痴想；be crazy about意思是对……疯狂。crazy是一个英文单词，词性为形容词和名词，意思指疯了的，疯狂的，比喻人发疯。也可以指疯子，怪人。
crazy的例句
He strides around the room beaming like a crazy man.
他绕着房间大步地走着，像个疯子一样笑着。
That crazy Debbie! He could wring her neck for this!
黛比那个疯子！他会为这把她的脖子拧断的！
We worked like crazy to get it done on time.
我们拼命地干，好按时完成这项工作。
I know it sounds crazy but it just might work.
我知道这事听起来很蠢，然而也许就会奏效。
Are you crazy? We could get killed doing that.
你疯了？我们那样做会丧命的。