She'll have an accident one day.

她总有一天会出事的。

Drive carefully and be sure not to have an accident.

你开车要小心，千万别闯祸。

Did you have an accident?

你出事故了吗？

Did you have an accident or something?

你发生了什么意外么？

It was feared that he might have an accident.

人们担心他出了事故。