1、英语表达：
What is going on?
what happened？
what's the matter？
what's up？
2、what happened（发生了什么事），动作发生在过去，所以用一般过去时。
3、词汇：
发生occur; occurrence; happen; germination; arises
什么事what; What's up; What's the matter
扩展资料：
重点词汇：happen、occur
1、happen：英 ['hæp(ə)n] 美 ['hæpən]
发生；碰巧；偶然遇到。
短语：
happen to be 碰巧是；恰巧是
as it happens 碰巧；偶然发生
happen on 偶然遇到或发现
happen to meet 偶然遇见
happen to coincide 不约而同；不谋而合
双语例句：
OK, clearly we'd be much better off if we had some systematic quantitative way to tell whether something would happen spontaneously.
好，如果我们有一些系统定量的方法来判断,一个过程是否会自发进行,那就会更好了。
2、occur：英 [ə'kɜː] 美 [ə'kɝ]
vi. 发生；出现；存在。
[ 过去式 occurred 过去分词 occurred 现在分词 occurring ]
短语：
occur as 以...的形式出现
occur for 发生在…时候
双语例句：
And will make mistakes. And therefore, you write your programs so that catastrophes don't occurwhen those mistakes are made.
就是人是很愚蠢的，会犯错误的，因此，你要这样设计你的程序,以达到当犯错误时避免大事故的目的。
参考资料来源：百度翻译--发生了什么事
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