There occured a serious problem.改错

There occured a serious problem.改错
There occured a serious problem.改错

There occured a serious problem.改错
occured改为occurs,这是倒装句的一种

There is a serious problem

某事件发生了，即sth+occur
改正为：a serious problem occured

楼上的两位解决的很好了，我就说一下错误的原因吧，chinese english。。。
这孩子完全是按中文一字一句翻译过来的 ，以后要注意啊~