When did this supposed accident happen?

这场所谓的事故发生在什么时候？

《牛津词典》

How did the accident happen?

事故是怎样发生的？

youdao

I saw the accident happen.

我看见了那起事故的发生。

youdao

Still,many people argue that his talent should be recognized because ten national coaching victories do not happen by accident.

VOA: special.2009.07.10

You think that you're terrific and because you're terrific the good things that happen to you are due to your terrific-ness; the bad things are due to accident and misfortune.

你觉得自己很棒,因为你很棒，所以发现在你身上的好事,都是因为你很棒才会发生的;,而坏事都是因为意外或倒霉。

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The story also tells what could happen to a person who had an accident.

VOA: special.2009.02.11

The prosecutor, Omid Talai, brought forth three eye witnesses, two walkers and one driver, who testified about seeing the accident happen.

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Reverend Moira Herkes said it was the worst accident to happen in the area for many years.

BBC: Glencoe avalanche: Four dead, say police

"The bear M13 had certainly never showed any aggression toward man, but the risk that an accident might happen and that people might be badly injured or killed had become intolerable, " it said.

CNN: Switzerland's only wild bear is killed as a danger to humans