摘要：sb crack up 开始大笑，开始捧腹大笑,禁不住（控制不住）大笑起来

1.crack sb. up 忍俊不禁，捧腹大笑

crack / kræk / V.说(笑话)；开(玩笑)

英文释义：to tell a joke

crack sb. up :to start laughing a lot; to make sb laugh a lot

The joke really cracked us up.

这个笑话真叫我们笑死了。

He cracks me up. I don't think I've met anybody so funny in my whole life.

他常逗我发笑，我一生中还没有见过这样有趣的人。

She told stories that cracked me up and I swore to write them down so you could enjoy them too.

她讲了几个令我捧腹大笑的故事，我一定要写下来，好让你也乐乐。

You know, you crack me up with your ridiculous ideas about how to succeed in life.

你知道吗？那些荒谬的人生成功之道每次都让我忍俊不禁。

Gill's so funny, she just cracks me up.

吉尔滑稽极了，逗得我哈哈大笑。

2. sb crack up 开始大笑，开始捧腹大笑,禁不住（控制不住）大笑起来

We all just cracked up laughing.

我们都不禁哈哈大笑起来。

He walked in and everyone just cracked up.

他一进来，人人都捧腹大笑起来。

The whole room cracked up when he finished the joke.

他讲完这笑话之后，全场捧腹大笑。

I kept a straight face as long as I could, but I finally had to crack up.

我尽量板着面孔，但最后还是控制不住失声大笑起来。

3. sb crack up

（因压力造成身体或精神）垮掉，崩溃

to become ill, either physically or mentally, because of pressure

You'll crack up if you carry on working like this.

你再这样干下去，身体会垮掉的。

She would have cracked up if she hadn't allowed herself some fun.

她若是没给自己找点乐趣的话，早就崩溃了。

Pressure of work caused John to crack up.

工作压力使约翰身体垮了。

Without the support of my parents I would have probably cracked up completely. But I managed to hang on

假如没有我父母的支持，我可能已经彻底垮掉了。但我还是坚持了下来。

4. not all, everything, etc. sb's cracked up to be

不像人们说的那么好

not as good as people say

Package holidays are not always all they're cracked up to be.

全包旅游并不总像人们说的那么好。

He's not nearly such a good writer as he's cracked up to be.

他远不是人们所说的那种优秀作家。

He made a very unfair crack about her looks.

他开玩笑地损了一下她的长相，言语很是刻薄。

来源：翅膀英语一点号