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1·The accident happened at 3 p.m.

事故发生于下午3点钟。《牛津词典》

2·Then a strange thing happened.

接着一件怪事发生了。《柯林斯英汉双解大词典》

3·Tell me what really happened.

告诉我究竟发生了什么事。《牛津词典》

4·Can you confirm what happened?

你能证实一下发生了什么事吗？《牛津词典》

5·I don't know how this happened.

我不知道这事怎么发生的。《牛津词典》

6·The crash happened in thick fog.

这次撞车发生在浓雾中。《柯林斯英汉双解大词典》

7·What happened! I exploded.

“出什么事了！”我情绪爆发了。《柯林斯英汉双解大词典》

8·I'm dying to know what happened.

我很想知道发生了什么事儿。《牛津词典》

9·We can only guess what happened.

我们只能猜测发生了什么事。《牛津词典》

10·What happened, is anything wrong?

发生什么了，有什么问题吗？《柯林斯英汉双解大词典》

发生

1·The crash happened in thick fog.

这次撞车发生在浓雾中。《柯林斯英汉双解大词典》

2·The accident happened at 3 p.m.

事故发生于下午3点钟。《牛津词典》

3·A terrible thing happened last night.

昨天夜里发生了一件可怕的事情。《牛津词典》

4·The accident happened on Friday night.

事故发生在星期五夜里。《牛津词典》

5·We pretended (that) nothing had happened.

我们假装什么事情也没发生。《牛津词典》

发生了

1·Then a strange thing happened.

接着一件怪事发生了。《柯林斯英汉双解大词典》

2·A strange thing happened this morning.

今天上午发生了一件怪事。《牛津词典》

3·You know perfectly well what happened.

你完全清楚发生了什么。《柯林斯英汉双解大词典》

4·What happened next?

随后发生了什么？《牛津词典》

5·Try to keep calm and just tell me what happened.

试着保持冷静，告诉我发生了什么。《柯林斯英汉双解大词典》

发生过

1·The funny thing is it never happened again after that.

奇怪的是从那以后这事再也没有发生过。《牛津词典》

2·Don't upset yourself about it—let's just forget it ever happened.

你别为这事烦恼了—咱们就只当它没发生过。《牛津词典》

3·That's because it hasn't happened.

因为那从来没有发生过。

4·It's not like this hasn't happened before.

这不是以前没有发生过的。

5·Next day, maybe, the Footman continued in the same tone, exactly as if nothing had happened.

“也许是第二天吧。”仆人继续用同样的声调说，仿佛什么事也没有发生过。

(1)what happened发生了什么；白宫内幕