发疯的英文：
go mad
go crazy
lose one's mind

参考例句：

Mary went mad because she was disappointed in a love affair
玛丽因失恋而发疯。

Go bananas;become mad or angryact very foolishly.
发疯发怒傻里傻气。

To make or become mad;madden.
使发疯或变得疯狂;使疯狂

"raving mad; his head becomes weaker
“某种程度的发疯，他的神志已经不清了。

The world is racketing around at an ever madder pace.
"人世喧嚣,节奏越来越快,简直令人发疯。"

wild with jealousy;a wild look in his eye;a wild rage.
嫉妒得发疯;他眼中带着的狂热的眼光;狂怒

Though it can't last long: once the crowds dispersed they'll quieten down again."
不过发疯是不能长久的，而且人散开了，火性也就过去了。”

Then he realized he had to find some way to occupy his mind or he would lose his sanity and probably his life
后来他了解他必须发现某种方式，使之占据心灵，不然他会发疯或死掉，

Start behaving crazily
变得狂热;发疯似的.

Go mad at the intensity of one's grief
因悲伤过度而发疯

mad是什么意思：
adj. 发疯的，发狂的；狂热的；着迷的；恼火的
v.（使）发狂；激怒；发怒
n. 狂怒

It is political madness.
这是政治愚昧。

Don't be mad at me.
不要对我大发脾气。

MAD(multiple applicator device)
多路并联施料设备（在毡毯上施加染液和胶料）

crazy是什么意思：
adj. 疯狂的；狂热的；着迷的
n. 疯子，怪人

They were foolish and arrogant, crazy.
这些人是愚蠢的，自大的、疯狂的。

There was a crazy man on the metro today.
今天地铁里有个疯子。

He is crazy about music.
他对音乐很着迷。

lose是什么意思：
v. 遗失；输掉；浪费；被...夺去；不明白；逃避；错过

to lose; to miss; to disappear; to mislay
遗失

A tale never loses in the telling.
故事总是被人们说得添枝加叶的。

Merry is he that has nought to lose
人无所失,不亦乐乎